Macular volume determined by optical coherence tomography as a measure of neuronal loss in multiple sclerosis. - Burkholder BM; Osborne B; Loguidice MJ; Bisker E; Frohman TC; Conger A; Ratchford JN; Warner C; Markowitz CE; Jacobs DA; Galetta SL; Cutter GR; et al. (Archives of neurology, 2009)