RT Journal Article SR Electronic T1 Can you feel the beat? How to define reference ranges for ambulatory heart rhythm monitoring JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1708 OP 1709 DO 10.1136/heartjnl-2020-317361 VO 106 IS 22 A1 Linda S B Johnson A1 David Conen YR 2020 UL http://heart.bmj.com/content/106/22/1708.abstract AB