1. Hainan Provincial Key Laboratory for human reproductive medicine and Genetic Research, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou, Hainan, China;
2. Department of Reproductive Medicine, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou, Hainan, China;
3. Department of Emergency, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China;
4. Department of General Practice, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China;
5. Hainan Affiliated Hospital of Hainan Medical University, University of South China, Haikou, Hainan, China