1. Department of Clinical Biochemistry, College of Laboratory Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
2. Department of Clinical Laboratory, The Second Affiliated Hospital, Dalian, Liaoning 116023, P.R. China
3. Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China