Childhood-onset RASopathy-associated hypertrophic cardiomyopathy, diastolic dysfunction, and arrhythmias. - Boleti OD; Roussos S; Monda E; Norrish G; Field E; Cervi E; Bakalakos A; Fernandes P; McLeod K; Ilina M; Khodaghalian B; Jones C; et al. (European heart journal, 2026)