Sachdeva, Parminder Kaur, Ashish Dahiya, and Ravinder Singh. 2016. “Incidence of Pelvic Inflammatory Disease in Backache in Females”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 5 (10):3322-25. https://doi.org/10.18203/2320-1770.ijrcog20163178.