SchlaHF Investigators. Phenotyping of sleep-disordered breathing in patients with chronic heart failure with reduced ejection fraction – the SchlaHF registry - Arzt, M; Oldenburg, O; Graml, A; Erdmann, E; Teschler, H; Wegscheider, K; Suling, A; Woehrle, H (J Am Heart Assoc, 2017)