RT Journal Article SR Electronic T1 Magnesium for nocturnal leg cramps JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 52 OP 52 DO 10.1136/dtb.2017.5.0475 VO 55 IS 5 YR 2017 UL http://dtb.bmj.com/content/55/5/52.1.abstract AB