1. Department of Laboratory, Xi’an No.3 Hospital, The Affiliated Hospital of Northwest University, Xi’an, Shaanxi, P.R.China
2. Department of Respiratory Medicine, Xi’an No.3 Hospital, The Affiliated Hospital of Northwest University, Xi’an, Shaanxi, P.R.China
3. Department of Pediatric, The Affiliated Hospital of Northwest University, Xi’an, Shaanxi, P.R.China