Greater risk of severe COVID-19 in Black, Asian and Minority Ethnic populations is not explained by cardiometabolic, socioeconomic or behavioural factors, or by 25(OH)-vitamin D status: study of 1326 cases from the UK Biobank - Raisi-Estabragh, Z; McCracken, C; Bethell, M S; Cooper, J; Cooper, C; Caulfield, M J (J Public Health (Oxf), 2020)