Seoul National University - Seoul National University Boramae Hospital, Seoul National University - Bundang Hospital, Seoul National University - Bundang Hospital, Seoul National University - Bundang Hospital, Seoul National University - Bundang Hospital, Chonnam National University - Chonnam National University Hospital, Chungnam National University Hospital, Pusan National University - Pusan National University Hospital, Inje University Ilsan Paik Hospital, Goyang, Chonnam National University - Chonnam National University Hospital, Seoul National University Hospital, Chungnam National University Hospital, Daejon, Pusan National University - Pusan National University Hospital, Inje University Ilsan Paik Hospital, Goyang, Chonnam National University Hwasun hospital, Hwasun, Ehwa Womans University Hospital, Yonsei University Wonju Severance Christian Hospital, Seoul Metropolitan Boramae Hospital, affiliation not provided to SSRN, Kyungpook National University, Hallym University Sacred Heart Hospital, Kangwon National University Hospital, Chonnam National University - Chonnam National University Hospital and Seoul National University - Department of Internal Medicine