单位:[1]Ctr Nat Prod, Natl Ctr Sci Res, Havana, Cuba[2]Tokyo Womens Med Univ, Dept Obstet & Gynecol, Tokyo, Japan[3]Beijing Eastern Asia, Pacific Bone & Mineral Res Ctr, Beijing 100102, Peoples R China[4]Sino Japanese Friendship Hosp, Beijing 100029, Peoples R China[5]Epidem Prevent Stn, Landfang City 065000, HeBei Province, Peoples R China