[1] Tokyo Med & Dent Univ, Dept Hlth Policy & Informat, Bunkyo Ku, Tokyo, Japan
[2] Natl Ctr Child Hlth & Dev, Dept Informat Technol & Management, Setagaya Ku, Tokyo, Japan
[3] Natl Ctr Child Hlth & Dev, Ctr Maternal Fetal Neonatal & Reprod Med, Setagaya Ku, Tokyo, Japan
[4] Natl Ctr Child Hlth & Dev, Div Med Secur & Patient Safety, Setagaya Ku, Tokyo, Japan
[5] Natl Ctr Child Hlth & Dev, Div Surg, Setagaya Ku, Tokyo, Japan
[6] Natl Ctr Child Hlth & Dev, Childrens Canc Ctr, Setagaya Ku, Tokyo, Japan
[7] Natl Ctr Geriatr & Gerontol, Dept Hlth Econ, Obu, Aichi, Japan
[8] San Ikukai Hosp, Sumida Ku, Tokyo, Japan