FTO and pulmonary arterial hypertension: Periventricular WMH, pulmonary arterial hypertension, carotid atherosclerosis, decreased supratentorial white matter volume, FTO gene polymorphism (Schmahmann et al., 2008; Schuff et al., 2009; Ho et al., 2010; Keller et al., 2011; Reitz et al., 2012; Verghese et al., 2013a; Caselli et al., 2015; Smith et al., 2015; Wardlaw et al., 2015; Chen et al., 2017; Ghaznawi et al., 2021)