1. Department of Obstetrics and Gynecology; Jiangsu Key Laboratory for Molecular Medicine; Nanjing Drum Tower Hospital; Nanjing University Medical School; Jiangsu China
2. Department of Obstetrics and Gynecology; Zhenjiang Fourth People's Hospital; Jiangsu China
3. Department of Obstetrics and Gynecology; Taixing People's Hospital; Jiangsu China
4. Department of Obstetrics and Gynecology; Wuxi Maternal and Child Health Hospital; Jiangsu China
5. Department of Obstetrics and Gynecology; Kunshan First People's Hospital; Jiangsu China
6. Department of Laboratory Medicine; Jiangsu Key Laboratory for Molecular Medicine; Nanjing Drum Tower Hospital; Nanjing University Medical School; Jiangsu China
7. Department of Biostatistics; Nanjing Drum Tower Hospital; Nanjing University Medical School; Jiangsu China
8. Department of Infectious Diseases; Nanjing Drum Tower Hospital; Nanjing University Medical School; Jiangsu China