Institution: | (1) Department of Pediatric Surgery, Shonai Hospital, Baba-cho, 997 Tsuruoka-city, Yamagata, Japan;(2) Department of Surgery, Shonai Hospital, Baba-cho, 997 Tsuruoka-city, Yamagata, Japan;(3) Department of Pediatric Surgery, Niigata University School of Medicine, 1-757 Asahimachi-dori, 951 Niigata-city, Niigata, Japan |