1 First Clinical Medical College, Department of Gynecology and Obstetrics, Guizhou University of Traditional Chinese Medicine, Guiyang, China.
2 Department of Gynecology and Obstetrics, Eugenics Center of Obstetrics, First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, China.
3 Department of Gynecology and Obstetrics, Eugenics Center of Obstetrics, First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, China - zyyyyiyuanzhou@163.com.