RT Journal Article SR Electronic T1 Does vitamin D deficiency play a role in the pathogenesis of chronic heart failure? Do supplements improve survival? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 290 OP 293 DO 10.3949/ccjm.77a.08078 VO 77 IS 5 A1 Hajjar, Victor A1 Depta, Jeremiah P. A1 Mountis, Maria M. YR 2010 UL http://www.ccjm.org/content/77/5/290.abstract AB