Validation of a New Classification for Severe Bronchopulmonary Dysplasia in Extremely Preterm Infants: Insights from a large Cohort Study

Hidehiko Nakanishi, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan; Masato Ito, Akita Redcross hospital, Akita shi, Akita, Japan; Shin Kato, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Aichi, Japan; Makoto Saito, University of Tsukuba, Tsukuba, Ibaraki, Japan; Naoyuki Miyahara, saitama medical center, kawagoe, Saitama, Japan; Hirokazu Arai, Akita Red Cross Hospital, Akita, Akita, Japan; Erika Ota, St.Luke's international university, Chuo-ku, Tokyo, Japan; Fumihiko Namba, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan