1 Department of PRK Center, The Affiliated Hospital of Inner Mongolia Medical University, Tongdao North Street, Hohhot, 010050, Inner Mongolia, China.
2 Department of Parasitology, The Basic Medical Sciences College of Inner Mongolia Medical University, Hohhot, 010050, Inner Mongolia, China.
3 Department of PRK Center, The Affiliated Hospital of Inner Mongolia Medical University, Tongdao North Street, Hohhot, 010050, Inner Mongolia, China. Electronic address: nmghhzhx@163.com.