CACNA1A and multiple system atrophy: While susceptibility was significantly higher in SCA1 and MSA-Cpatients compared with controls (Row 4, indicated in red to yellow colourscheme, Fig. 1 and Supplementary Figs3–5), it was significantly lower in SCA6 patients comparedwith controls (Row 4, indicated in blue to cyan colour scheme, Fig. 1 and Supplementary Figs3–5).