O. Arah, Y. Chiba, and S. Greenland. Annals of epidemiology, 18 (8):
637-46(August 2008)4616<m:linebreak></m:linebreak>JID: 9100013; 2007/09/14 received; 2008/03/10 revised; 2008/04/02 accepted; ppublish;<m:linebreak></m:linebreak>Mesures d'associació.