Prevalence of anti-basal ganglia antibodies in adult obsessive-compulsive disorder: cross-sectional study. by Nicholson, T, Ferdinando, S, Krishnaiah, R, Anhoury, S, Lennox, B, Mataix-Cols, D, Cleare, A, Veale, D, Drummond, L, Fineberg, N, Church, A, Giovannoni, G, Heyman, I