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Selwyn D. Collins, Age Incidence of Specific Causes of Illness: Based on Records for 9,000 Families in 18 States Visited Periodically for 12 Months, 1928-31, Public Health Reports (1896-1970), Vol. 50, No. 41 (Oct. 11, 1935), pp. 1404-1427
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Selwyn D. Collins (1935) studied this question.
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