1 Department of orthopaedics, Cangzhou Clinical College of Integrated Traditional Chinese and Western Medicine of Hebei Medical University, Cangzhou, 061000, China. Electronic address: liuqinglei180@sina.com.
2 Department of orthopaedics, Cangzhou Clinical College of Integrated Traditional Chinese and Western Medicine of Hebei Medical University, Cangzhou, 061000, China.