RT Journal Article SR Electronic T1 Heartbeat: calcium belongs in bones not hearts JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 899 OP 901 DO 10.1136/heartjnl-2022-321376 VO 108 IS 12 A1 Catherine M Otto YR 2022 UL http://heart.bmj.com/content/108/12/899.abstract AB