Breast cancer and combined oral contraceptives: Results from a multinational study
Berry, Geoffrey; MacLennan, Robert; Shearman, Rodney; Jelihovsky, Tatiana; Booth, Joan Cooper; Molina, Ramiro; Martinez, Luis; Salas, Oriana; Dabancens, Alfredo; Zhiheng, Chen; Yun, Tao; Wei, Hu Yong; Cuadros, Alvaro; Aristizabal, Nubia; Ebeling, K.; Nishan, P.; Kunde, D (1990)