Randomized trial of active vitamin D, cholecalciferol and placebo for CKD-MBDMOE, SHARON MNational Institutes of Health (NIH), National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) (ID: 1U34DK090953-01A1), $437,593USD, 07/01/2011 -- 12/31/2012