Singhal, S.; Rajoria, L.; Mital, P.; Batar, A.; Ainani, R.; Agarwal, M.; ., U.; Chaudhary, K. Risk of Malignancy Index 4 in Preoperative Evaluation of Patients With Ovarian Tumours. Int J Reprod Contracept Obstet Gynecol 2018, 7, 2467-2471.