Paternal occupational exposure to chemicals and secondary sex ratio: results from the Japan Environment and Children's Study oleh Sho Adachi, PhD, Junko Sawaki, PhD, Narumi Tokuda, MS, Hiroyuki Tanaka, ProfPhD, Hideaki Sawai, ProfPhD, Yasuhiro Takeshima, ProfPhD, Hiroaki Shibahara, ProfPhD, Masayuki Shima, ProfPhD