Letter: SMON probably occurred in 1938 in Japan.
D000005:Abdomen; D005260:Female; D049673:History, 20th Century; D006801:Humans; D007564:Japan; D008875:Middle Aged; D009187:Myelitis / Q000453:epidemiology*; D009902:Optic Neuritis / Q000453:epidemiology*; D010146:Pain / Q000453:epidemiology