The risks of drowning: males in Maryland rivers.
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D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004332:Drowning / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008396:Maryland / Q000453:epidemiology; D008875:Middle Aged; D012307:Risk Factors; D012737:Sex Factors