Abstract
Haheim, LL; Lindahl, AK
Haheim, LL (reprint author), Kunnskapssenteret Folkehelseinst, Oslo, Norway.; Haheim, LL (reprint author), Univ Oslo, Odontol Fak, Oslo, Norway.; Haheim, LL (reprint author), Norsk Forening Epidemiol NOFE, Oslo, Norway.
TIDSSKRIFT FOR DEN NORSKE LAEGEFORENING, 2017; 137 (6): 438