1. Department of Obstetrics and Gynecology, Center for Reproductive Medicine; Anhui Provincial Hospital Affiliated to Anhui Medical University; Hefei Anhui China
2. Reproductive Medicine; Department of Obstetrics and Gynecology; Chicago Medical School at Rosalind Franklin University of Medicine and Science; Vernon Hills IL USA
3. Department of Microbiology and Immunology; Chicago Medical School at Rosalind Franklin University of Medicine and Science; Vernon Hills IL USA