Implementation of an Absolute Brain $^{1}$H-MRS Quantification Method to Assess Different Tissue Alterations in Multiple Sclerosis. - Matthieu Bagory; Françoise Durand-Dubief; Danielle Ibarrola; Jean-Christophe Comte; François Cotton; Christian Confavreux; Dominique Sappey-Marinier (IEEE Trans. Biomed. Eng., 2012)