Secular trends in leprosy: increase in age at onset associated with declining rates and long incubation periods.
D000328:Adult; D000367:Age Factors; D002648:Child; D002681:China; D005260:Female; D006801:Humans; D007194:India; D007564:Japan; D007918:Leprosy / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009549:Nigeria; D009664:Norway; D011159:Population Surveillance; D012306:Risk; D013997:Time Factors; D014481:United States; D014687:Venezuela