Elbarbary, H. S., A. R. El Arbagy, M. A. Kora, and M. M. Soliman. “Study of Serum 25-Hydroxyvitamin D in Critically Ill Patients With Acute Kidney Injury”. JOURNAL OF ADVANCES IN BIOLOGY, vol. 6, no. 1, Oct. 2014, pp. 825-34, doi:10.24297/jab.v6i1.5465.