1. Department of Pediatrics Graduate School of Medical ScienceKyoto Prefectural University of Medicine KyotoJapan
2. Department of Epidemiology for Community Health and Medicine Kyoto Prefectural University of Medicine Kyoto Japan
3. Department of Neurology Kyoto Prefectural University of Medicine Kyoto Japan
4. Department of Obstetrics and Gynecology Kyoto Prefectural University of Medicine Kyoto Japan
5. Department of Biostatistics Kyoto Prefectural University of Medicine Kyoto Japan