Fluctuating asymmetry of digit length of Hui and Han ethnic groups in Ningxia
1. Department of Medical Genetic and Cell Biology, Ningxia Medical University, Yinchuan 750004, China;2. Key Laboratory of Reporoduction and Genetics in Ningxia, Yinchuan 750004, China;3. Key Laboratory of Fertility Preservation and Maintenance Ningxia Medical University, Ministry of Education, Yinchuan 750004, China;4. Medical Experimental Center in Affiliated Hospital, Ningxia Medical University, Yinchuan 750004, China