1 Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China.
2 Histology and Embryology, Saint Camillus International University of Health Sciences, Rome, Italy.
3 Department of Obstetrics and Gynecology, Department of Surgery, Department of Biology, McGill University Health Centre, McGill University, Montréal, QC, Canada.