RT Journal Article SR Electronic T1 Methyl xanthine diuretics JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 310 OP 310 DO 10.1136/hrt.65.6.310 VO 65 IS 6 A1 Hollman, A YR 1991 UL http://heart.bmj.com/content/65/6/310.abstract AB