Hallym University, Seoul National University, Seoul National University - Department of Biomedical Science, Chungbuk National University, Seoul National University - Department of Preventive Medicine, Seoul National University - Seoul National University Hospital, Seoul National University, Seoul National University, Seoul National University, Seoul Metropolitan Boramae Hospital - Department of Surgery, St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control and Seoul National University - Seoul National University Hospital

St Jude Children’s Research Hospital - Department of Biostatistics, St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control, Children's Hospital of Philadelphia - Department of Pediatrics, St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control, St Jude Children’s Research Hospital - Department of Biostatistics, St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control, St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control, St. Jude Children’s Research Hospital - Department of Oncology and St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control