Zhiguo Du1, Huazhu Wang2. 1. Department of Hand Surgery, Cangzhou Hospital of Integrated Traditional and Western Medicine of Hebei Province, Cangzhou, Hebei Province, 061000, China. 2. Department of Hand Surgery, Cangzhou Hospital of Integrated Traditional and Western Medicine of Hebei Province, Cangzhou, Hebei Province, 061000, China. Electronic address: 1310714631@qq.com.