title: Letter: Histocompatibility determinants in multiple sclerosis.
mesh_terms: D000483:Alleles; D002874:Chromosome Mapping; D003434:Crossing Over, Genetic; D005787:Gene Frequency; D008040:Genetic Linkage; D006649:Histocompatibility Antigens / Q000032:analysis*; D006801:Humans; D009103:Multiple Sclerosis / Q000235:genetics* / Q000276:immunology
chemical_list: D006649:Histocompatibility Antigens