Effect of polygenic risk for schizophrenia on cardiac structure and function: a UK Biobank observational study by Pillinger, T, Osimo, EF, de Marvao, A, Shah, M, Francis, C, Huang, J, D'Ambrosio, E, Firth, J, Nour, MM, McCutcheon, RA, Pardiñas, AF, Matthews, PM, O'Regan, DP, Howes, OD