Hypoxaemia in patients with heart failure and preserved ejection fraction. - Omar, Massar; Omote, Kazunori; Sorimachi, Hidemi; Popovic, Dejana; Kanwar, Ardaas; Alogna, Alessio; Reddy, Yogesh N.V.; Lim, Kaiser G.; Shah, Sanjiv J.; Borlaug, Barry A. (European Journal of Heart Failure, 2023)