1 Department of Pathology, the Third Affiliated Hospital of Guangdong Medical University (Longjiang Hospital, Shunde District, Foshan City), Foshan 528000, China.
2 Department of Pathology, the Central Hospital of Shengli Oilfield, Dongying 257000, China.
3 Department of Pathology, the Fourth People's Hospital, Nanhai District, Foshan City, Guangdong Province, Foshan 528200, China.
4 Department of Gynecology, the Central Hospital of Shengli Oilfield, Dongying 257000, China.