Sharma, P., Shrestha, B., Ansari, M., Singh, D. and Singh, B. 2012. Evaluation of Renal Venous Impedance, Pyelocalyectasis and Their Correlation during Pregnancy Using Doppler Ultrasound Examination: A Case Control Study. Nepalese Journal of Radiology. 2, 1 (Oct. 2012), 25–30. DOI:https://doi.org/10.3126/njr.v2i1.6976.