%0 Journal Article %A Yue Leng %A Kristine Yaffe %T To nap or not to nap: more questions than answers %D 2019 %R 10.1136/heartjnl-2019-315442 %J Heart %P heartjnl-2019-315442 %U https://heart.bmj.com/content/heartjnl/early/2019/08/16/heartjnl-2019-315442.full.pdf