RT Journal Article SR Electronic T1 Lack of clarity about frequency for monitoring renal function in heart failure guidelines JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 5 OP 5 DO 10.1136/dtb.2018.1.0574 VO 56 IS 1 YR 2018 UL http://dtb.bmj.com/content/56/1/5.abstract AB