Reply.
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Department of Reproductive Endocrinology, West China Second University Hospital, Sichuan University, Chengdu, China.
Weiyao
W
Yin
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Weimin
W
Ye