1. Department of Medical Laboratory, Tianjin First Central Hospital, Tianjin 300192, P.R. China
2. Laboratory of Acupuncture and Moxibustion, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300193, P.R. China
3. Department of Medical Laboratory, Tianjin Children's Hospital, Tianjin 300134, P.R. China