RT Journal Article SR Electronic T1 To nap or not to nap: more questions than answers JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1768 OP 1769 DO 10.1136/heartjnl-2019-315442 VO 105 IS 23 A1 Leng, Yue A1 Yaffe, Kristine YR 2019 UL http://heart.bmj.com/content/105/23/1768.abstract AB