Multiple sclerosis and amyotrophic lateral sclerosis.
D000328:Adult; D000367:Age Factors; D000368:Aged; D000690:Amyotrophic Lateral Sclerosis / Q000453:epidemiology* / Q000401:mortality; D002980:Climate; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000401:mortality; D044469:Racial Groups; D012737:Sex Factors; D014481:United States