[A survey on trachoma among a population of 150,000 in the Chefoo (Yantai) district, Shantung Province].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D014141:Trachoma / Q000453:epidemiology*