1. Reproductive Center, SSL Central Hospital of Dongguan City, Dongguan City, People’s Republic of China
2. Department of Clinical Laboratory, Dongguan People’s Hospital, Dongguan City, People’s Republic of China
3. Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan City, People’s Republic of China
4. Department of Gynaecology and Obstetrics and Reproductive Medicine, Second Clinical Medical College of Guangdong Medical, Guangdong Medical University, Dongguan City, People’s Republic of China