Affiliation: | (1) First Department of Surgery, Gunma University School of Medicine, 3-39-15, Showa-machi, Maebashi, 371 Gunma, Japan;(2) Department of Obstetrics and Gynecology, Gunma University School of Medicine, 3-39-15, Showa-machi, Maebashi, 371 Gunma, Japan;(3) Department of Pediatrics, Gunma University School of Medicine, 3-39-15, Showa-machi, Maebashi, 371 Gunma, Japan |