A Noninvasive Comparison Study between Human Gliomas with IDH1 and IDH2 Mutations by MR Spectroscopy oleh Xin Shen, Natalie L. Voets, Sarah J. Larkin, Nick de Pennington, Puneet Plaha, Richard Stacey, James S. O. McCullagh, Christopher J. Schofield, Stuart Clare, Peter Jezzard, Tom Cadoux-Hudson, Olaf Ansorge, Uzay E. Emir