RETRACTION: Ultrasound image guided lateral cervical approach to stellate ganglion block for cervical headache (Retraction of Vol 735, art no 135139, 2020)-MedSci.cn

RETRACTION: Ultrasound image guided lateral cervical approach to stellate ganglion block for cervical headache (Retraction of Vol 735, art no 135139, 2020)

Yu, Q; Zheng, ER; Li, XK; Ding, XJ

Ding, XJ (corresponding author), Weifang Peoples Hosp, Ultrasound Dept, Weifang 261000, Shandong, Peoples R China.