Stefanick Marcia L, Cochrane Barbara B, Hsia Judith, Barad David H, Liu James H, Johnson Susan R
Stanford Center for Research in Disease Prevention, Stanford University, Palo Alto, CA, USA.
Ann Epidemiol. 2003 Oct;13(9 Suppl):S78-86. doi: 10.1016/s1047-2797(03)00045-0.