1. Division of Infectious Diseases; Department of Medicine; Tsukuba Medical Center Hospital; Tsukuba Ibaraki Japan
2. Department of Pediatrics; Tsukuba Medical Center Hospital; Tsukuba Ibaraki Japan
3. Department of Radiology; Tsukuba Medical Center Hospital; Tsukuba Ibaraki Japan
4. Department of Respiratory Medicine; Tsukuba Medical Center Hospital; Tsukuba Ibaraki Japan
5. Department of Clinical Laboratory; Tsukuba Medical Center Hospital; Tsukuba Ibaraki Japan