SERUM AUTOANTIBODIES TO GLUTAMIC ACID DECARBOXYLASE ARE ASSOCIATED WITH REDUCED CORTICAL GABA LEVELS IN PATIENTS WITH EPILEPSY - Stagg, C; Lang, B; Hest, J; Cavey, A; Johansen-Berg, H; Coles, A; Hart, Y; Sisodiya, S; Wroe, S; Duncan, J; Vincent, A; Palace, J (2009)