1. From the Department of Radiology, West China Second University Hospital, Sichuan University, Chengdu, China (R.X.); Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Chengdu, China (R.X.); and Department of Radiology, The Fourth People’s Hospital of Chengdu, No. 8 West Huli Lane, Jinniu District, Chengdu, 610041, China (G.Z.).