1. Department of Respiratory Medicine; Hiroshima Prefectural Hospital; Hiroshima Japan
2. Department of Internal Medicine; Rikita Hospital; Hiroshima Japan
3. Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences; Hiroshima University; Hiroshima Japan
4. Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences; Hiroshima University; Hiroshima Japan
5. Department of Respiratory Medicine; Hiroshima City Hiroshima Citizens Hospital; Hiroshima Japan