JAMA:献血后,要不要补铁?

2015-02-18 梁怀彬 译 MedSci原创

众所周知,少量献血后是不需要采取什么特殊的药物来快速促进人体造血,人体正常的代偿就会缓慢恢复献血时所失去的血量,并能完全恢复能献血前水平,只是因体质不同,恢复时间快慢不同而已。如果献血后口服铁剂,又会发生什么?JAMA杂志2月16日刊登了一篇文章阐述献血后口服铁剂补铁的益处。首先研究者提出研究的背景:基于在美国允许的两次献血间隔的时间差最小是8周,但是血红蛋白的恢复(恢复到目前普遍接受的标准线12


众所周知,少量献血后是不需要采取什么特殊的药物来快速促进人体造血,人体正常的代偿就会缓慢恢复献血时所失去的血量,并能完全恢复能献血前水平,只是因体质不同,恢复时间快慢不同而已。如果献血后口服铁剂,又会发生什么?

JAMA杂志2月16日刊登了一篇文章阐述献血后口服铁剂补铁的益处。

首先研究者提出研究的背景:基于在美国允许的两次献血间隔的时间差最小是8周,但是血红蛋白的恢复(恢复到目前普遍接受的标准线12.5 g/dL)常常是延迟的,一些献血者为此较长时间处于贫血状态!

为确定口服补铁剂对血红蛋白恢复时间的影响(以恢复献血所丢失血红蛋白的80%所用的天数为计量单位)、贫铁蛋白捐献人群(铁蛋白≤26 ng/mL)和富铁蛋白捐献人群(>26 ng/mL)献血后铁储备的恢复时间,研究者开展了此RCT实验。实验于2012年在美国四个不同区域的血液中心开展,实验人群按照铁蛋白水平、性别、年龄进行分层。受试人群为215名合格的捐献者,年龄从18到79岁不等,近4个月内无捐献全血或红细胞史。两组人群中,实验组每日服用一片葡萄糖酸亚铁(含37.5mg铁元素),对照组无。两组人群献出一单位全血(500ml)后连续观察24周(168天)。主要观察终点是恢复献血后血红蛋白下降量的80%所用时间和铁储备恢复到基线水平所用时间。

研究结果显示,补铁和不补铁两组人群献血前的基线血红蛋白水平没有统计学差异。贫铁蛋白组人群平均血红蛋白从13.4 (SD:1.1) g/dL 下降到 12.0 (1.2) g/dL,富铁蛋白组人群平均血红蛋白水平从14.2 (1.1) g/dL 下降到 12.9 (1.2) g/dL。和没有服用铁剂的人群相比,服用铁剂的人群表现出更短的血红蛋白恢复时间,不管是贫铁蛋白组(平均80%恢复时间32天,四分位数间距IQR:30-34 VS 对应的未服用铁剂人群平均80%恢复时间158天,IQR:126->168)还是富铁蛋白组(平均80%恢复时间31天,IQR:29-33 VS 对应的未服用铁剂人群平均80%恢复时间78天,IQR:66-95)。贫铁蛋白组服用铁剂的人群的铁蛋白水平恢复到基线所用的中位时间是21天(IQR, 12-84),未服用铁剂恢复到基线的中位时间大于168天(IQR, 128->168)。高铁蛋白组服用铁剂的人群的铁蛋白水平恢复到基线所用的中位时间是107天(IQR, 75-141),未服用铁剂恢复到基线的中位时间大于168天(IQR, >168->168)。服用铁剂的所有受试者铁储备恢复的中位时间是76天(IQR, 20-126),未服用铁剂的所有受试者铁储备恢复的中位时间大于168天(IQR, 147->168 days; P < .001)。

研究者说:献血后如果不补铁,67%的献血者在168天之内铁储备仍不能恢复到正常水平。即便是血红蛋白水平正常的献血者,不管体内铁蛋白基础浓度水平是高还是低,献血后每日补充少量剂量的铁剂,都会大大缩短血红蛋白恢复时间。

clinicaltrials.gov 实验注册号:NCT01555060

原始出处:
Kiss JE, Brambilla D, Glynn SA, et al. Oral Iron Supplementation After Blood Donation: A Randomized Clinical Trial. JAMA. 2015;313(6):575-583. doi:10.1001/jama.2015.119.

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  1. [GetPortalCommentsPageByObjectIdResponse(id=17540, encodeId=89d21e54045, content=这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Wed Mar 04 08:44:00 CST 2015, time=2015-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16617, encodeId=f5821661e14, content=循证的价值在于证据, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200929/a728955a65064ea7a0cb3fc6ab71cabd/02b2d099111d4a7a87c88d367ea1bf87.jpg, createdBy=ccf176597, createdName=zholia, createdTime=Fri Feb 20 19:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16616, encodeId=a46116616bb, content=循证医学是一把利器, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=121.234.2.**, createdTime=Fri Feb 20 19:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1499769, encodeId=f7fe1499e6970, content=<a href='/topic/show?id=c1e59018895' target=_blank style='color:#2F92EE;'>#补铁#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90188, encryptionId=c1e59018895, topicName=补铁)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=97fb9374773, createdName=kksonne, createdTime=Fri Feb 20 02:21:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16367, encodeId=8d8d1636e2d, content=这个研究之前,献血后很少有人会服用铁剂。, beContent=null, objectType=article, channel=null, level=null, likeNumber=110, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=ead2109432, createdName=illustrator, createdTime=Wed Feb 18 13:42:00 CST 2015, time=2015-02-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16362, encodeId=f897163623e, content=这个研究极具价值!, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Wed Feb 18 11:30:00 CST 2015, time=2015-02-18, status=1, ipAttribution=)]
    2015-03-04 lovejing

    这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=17540, encodeId=89d21e54045, content=这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Wed Mar 04 08:44:00 CST 2015, time=2015-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16617, encodeId=f5821661e14, content=循证的价值在于证据, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200929/a728955a65064ea7a0cb3fc6ab71cabd/02b2d099111d4a7a87c88d367ea1bf87.jpg, createdBy=ccf176597, createdName=zholia, createdTime=Fri Feb 20 19:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16616, encodeId=a46116616bb, content=循证医学是一把利器, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=121.234.2.**, createdTime=Fri Feb 20 19:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1499769, encodeId=f7fe1499e6970, content=<a href='/topic/show?id=c1e59018895' target=_blank style='color:#2F92EE;'>#补铁#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90188, encryptionId=c1e59018895, topicName=补铁)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=97fb9374773, createdName=kksonne, createdTime=Fri Feb 20 02:21:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16367, encodeId=8d8d1636e2d, content=这个研究之前,献血后很少有人会服用铁剂。, beContent=null, objectType=article, channel=null, level=null, likeNumber=110, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=ead2109432, createdName=illustrator, createdTime=Wed Feb 18 13:42:00 CST 2015, time=2015-02-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16362, encodeId=f897163623e, content=这个研究极具价值!, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Wed Feb 18 11:30:00 CST 2015, time=2015-02-18, status=1, ipAttribution=)]
    2015-02-20 zholia

    循证的价值在于证据

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=17540, encodeId=89d21e54045, content=这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Wed Mar 04 08:44:00 CST 2015, time=2015-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16617, encodeId=f5821661e14, content=循证的价值在于证据, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200929/a728955a65064ea7a0cb3fc6ab71cabd/02b2d099111d4a7a87c88d367ea1bf87.jpg, createdBy=ccf176597, createdName=zholia, createdTime=Fri Feb 20 19:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16616, encodeId=a46116616bb, content=循证医学是一把利器, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=121.234.2.**, createdTime=Fri Feb 20 19:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1499769, encodeId=f7fe1499e6970, content=<a href='/topic/show?id=c1e59018895' target=_blank style='color:#2F92EE;'>#补铁#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90188, encryptionId=c1e59018895, topicName=补铁)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=97fb9374773, createdName=kksonne, createdTime=Fri Feb 20 02:21:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16367, encodeId=8d8d1636e2d, content=这个研究之前,献血后很少有人会服用铁剂。, beContent=null, objectType=article, channel=null, level=null, likeNumber=110, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=ead2109432, createdName=illustrator, createdTime=Wed Feb 18 13:42:00 CST 2015, time=2015-02-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16362, encodeId=f897163623e, content=这个研究极具价值!, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Wed Feb 18 11:30:00 CST 2015, time=2015-02-18, status=1, ipAttribution=)]
    2015-02-20 121.234.2.**

    循证医学是一把利器

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=17540, encodeId=89d21e54045, content=这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Wed Mar 04 08:44:00 CST 2015, time=2015-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16617, encodeId=f5821661e14, content=循证的价值在于证据, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200929/a728955a65064ea7a0cb3fc6ab71cabd/02b2d099111d4a7a87c88d367ea1bf87.jpg, createdBy=ccf176597, createdName=zholia, createdTime=Fri Feb 20 19:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16616, encodeId=a46116616bb, content=循证医学是一把利器, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=121.234.2.**, createdTime=Fri Feb 20 19:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1499769, encodeId=f7fe1499e6970, content=<a href='/topic/show?id=c1e59018895' target=_blank style='color:#2F92EE;'>#补铁#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90188, encryptionId=c1e59018895, topicName=补铁)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=97fb9374773, createdName=kksonne, createdTime=Fri Feb 20 02:21:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16367, encodeId=8d8d1636e2d, content=这个研究之前,献血后很少有人会服用铁剂。, beContent=null, objectType=article, channel=null, level=null, likeNumber=110, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=ead2109432, createdName=illustrator, createdTime=Wed Feb 18 13:42:00 CST 2015, time=2015-02-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16362, encodeId=f897163623e, content=这个研究极具价值!, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Wed Feb 18 11:30:00 CST 2015, time=2015-02-18, status=1, ipAttribution=)]
    2015-02-20 kksonne
  5. [GetPortalCommentsPageByObjectIdResponse(id=17540, encodeId=89d21e54045, content=这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Wed Mar 04 08:44:00 CST 2015, time=2015-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16617, encodeId=f5821661e14, content=循证的价值在于证据, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200929/a728955a65064ea7a0cb3fc6ab71cabd/02b2d099111d4a7a87c88d367ea1bf87.jpg, createdBy=ccf176597, createdName=zholia, createdTime=Fri Feb 20 19:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16616, encodeId=a46116616bb, content=循证医学是一把利器, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=121.234.2.**, createdTime=Fri Feb 20 19:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1499769, encodeId=f7fe1499e6970, content=<a href='/topic/show?id=c1e59018895' target=_blank style='color:#2F92EE;'>#补铁#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90188, encryptionId=c1e59018895, topicName=补铁)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=97fb9374773, createdName=kksonne, createdTime=Fri Feb 20 02:21:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16367, encodeId=8d8d1636e2d, content=这个研究之前,献血后很少有人会服用铁剂。, beContent=null, objectType=article, channel=null, level=null, likeNumber=110, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=ead2109432, createdName=illustrator, createdTime=Wed Feb 18 13:42:00 CST 2015, time=2015-02-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16362, encodeId=f897163623e, content=这个研究极具价值!, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Wed Feb 18 11:30:00 CST 2015, time=2015-02-18, status=1, ipAttribution=)]
    2015-02-18 illustrator

    这个研究之前,献血后很少有人会服用铁剂。

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=17540, encodeId=89d21e54045, content=这是献全血必须半年后再献的时间依据来源么?另外献成分血没提到啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Wed Mar 04 08:44:00 CST 2015, time=2015-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16617, encodeId=f5821661e14, content=循证的价值在于证据, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200929/a728955a65064ea7a0cb3fc6ab71cabd/02b2d099111d4a7a87c88d367ea1bf87.jpg, createdBy=ccf176597, createdName=zholia, createdTime=Fri Feb 20 19:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16616, encodeId=a46116616bb, content=循证医学是一把利器, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=121.234.2.**, createdTime=Fri Feb 20 19:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1499769, encodeId=f7fe1499e6970, content=<a href='/topic/show?id=c1e59018895' target=_blank style='color:#2F92EE;'>#补铁#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90188, encryptionId=c1e59018895, topicName=补铁)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=97fb9374773, createdName=kksonne, createdTime=Fri Feb 20 02:21:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16367, encodeId=8d8d1636e2d, content=这个研究之前,献血后很少有人会服用铁剂。, beContent=null, objectType=article, channel=null, level=null, likeNumber=110, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=ead2109432, createdName=illustrator, createdTime=Wed Feb 18 13:42:00 CST 2015, time=2015-02-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16362, encodeId=f897163623e, content=这个研究极具价值!, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Wed Feb 18 11:30:00 CST 2015, time=2015-02-18, status=1, ipAttribution=)]
    2015-02-18 medcardio

    这个研究极具价值!

    0

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