Bruhn, H., Frahm, J., Merboldt, K. D., Haenicke, W., Hanefeld, F., Christen, H. J., et al. (1992). Multiple sclerosis in children: Cerebral metabolic alterations monitored by localized proton magnetic resonance spectroscopy in vivo. Annals of Neurology, 32(2), 140-150.