RT Journal Article SR Electronic T1 Lack of definitive evidence for the use of renin-angiotensin system antagonists for heart failure with preserved ejection fraction JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 226 OP 227 DO 10.1136/eb-2013-101238 VO 18 IS 6 A1 Khalid, Umair A1 Deswal, Anita YR 2013 UL http://ebm.bmj.com/content/18/6/226.abstract AB