Magnetic resonance spectroscopy for 2-hydroxyglutarate identifies IDH mutant gliomas by Larkin, S, Near, J, Kudari, M, Khrapitchev, A, Sibson, N, Jezzard, P, Pfeffer, I, Al-Qahtani, K, Schofield, C, Mccullagh, J, Ansorge, O