Spectrum of movement disorders and neurotransmitter abnormalities in paediatric POLG disease by Papandreou, A, Rahman, S, Fratter, C, Ng, J, Meyer, E, Carr, LJ, Champion, M, Clarke, A, Gissen, P, Hemingway, C, Hussain, N, Jayawant, S, King, MD, Lynch, BJ, Mewasingh, L, Patel, J, Prabhakar, P, Neergheen, V, Pope, S, Heales, SJR, Poulton, J, Kurian, MA