[1] BC Womens Ctr Pelv Pain & Endometriosis, Vancouver, BC, Canada
[2] Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada
[3] Womens Hlth Res Inst, Vancouver, BC, Canada
[4] Univ Calgary, Dept Family Med, Calgary, AB, Canada
[5] Univ Calgary, Fac Kinesiol, Calgary, AB, Canada
[6] Univ Calgary, Alberta Childrens Hosp Res Inst, Calgary, AB, Canada
[7] Univ British Columbia, Ctr Menstrual Cycle & Ovulat Res, Vancouver, BC, Canada
[8] Univ British Columbia, Dept Med, Div Endocrinol & Metab, Vancouver, BC, Canada
[9] Univ British Columbia, Sch Populat & Publ Hlth, Vancouver, BC, Canada