1. Clinical Laboratory, Inner Mongolia People’s Hospital, Hohhot 010010, P.R. China
2. College of Life Science, Inner Mongolia Agricultural University, Hohhot 010018, P.R. China
3. Department of General Surgery, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010010, P.R. China
4. Inner Mongolia Medical University, Hohhot 010110, P.R. China