1. Department of Respiratory Medicine, Huzhou Central Hospital, Huzhou, Zhejiang 313000, P.R.�China
2. Center of Clinical Laboratory, The First People's Hospital of Huzhou, Huzhou Teachers College, Huzhou, Zhejiang 313000, P.R.�China
3. Department of Medical Laboratory, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou, Zhejiang 325000, P.R.�China
4. Center of Clinical Laboratory, The First People's Hospital of Huzhou, Huzhou Teachers College, Huzhou, Zhejiang 313000, P.R. China
5. Department of Respiratory Medicine, Huzhou Central Hospital, Huzhou, Zhejiang 313000, P.R. China