1. Institute of Oncology, The First College of Clinical Medical Science, Yichang Central People's Hospital Affiliated to China Three Gorges University, Yichang, Hubei 443000, P.R. China
2. Department of Thyroid and Breast, The First College of Clinical Medical Science, Yichang Central People's Hospital Affiliated to China Three Gorges University, Yichang, Hubei 443000, P.R. China
3. School of Medicine, Stanford University, Stanford, CA 94305, USA
4. Department of Clinical Laboratory, Chibi Pu Spinning Hospital, Chibi, Hubei 437321, P.R. China