1 Department of General Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan.
2 Department of Pediatrics, Chang Gung Children's Hospital, Kaohsiung, Taiwan.
3 Department of Pediatrics, Chang Gung Children's Hospital, Kaohsiung, Taiwan; Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University, College of Medicine, Kaohsiung, Taiwan. Electronic address: nocturne11@cgmh.org.tw.