Homozygous mutations in VAMP1 cause a presynaptic congenital myasthenic syndrome. - Salpietro V; Lin W; Delle Vedove A; Storbeck M; Liu Y; Efthymiou S; Manole A; Wiethoff S; Ye Q; Saggar A; McElreavey K; Krishnakumar SS; et al. (Annals of neurology, 2017)