title: Increased sister-chromatid exchange in multiple sclerosis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003434:Crossing Over, Genetic; D006801:Humans; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000235:genetics*; D012854:Sister Chromatid Exchange