H. Naqvi, I. ., K. . Mahmood, M. . Manzor, and S. . B. Chandio. “Sick Parathyroid in Patients Having Cirrhosis of Liver With Hypovitaminosis D”. Scientific Journal of Medical Science, vol. 2, no. 7, July 2013, pp. 124-32, http://sjournals.com/index.php/sjms/article/view/1522.