1. Department of Obstetrics and Gynecology; Fukushima Medical University; Fukushima Japan
2. Department of Neurology; Fukushima Medical University; Fukushima Japan
3. Fukushima Global Medical Science Center, Advanced Clinical Research Center; Fukushima Medical University; Fukushima Japan
4. Department of Biological Sciences; Asahikawa Medical University; Asahikawa Japan