References 3 and 4 of the letter: Infant Mortality, Breast-Feeding, and Improved Health Surveillance, by Dr. Allan S. Cunningham, Pediatrics, 50:823, were in error. They should be corrected to:
3. Grulee, C. S., Sanford, H. N., and Schwartz, H.: Breast and artificially fed infants. A study of the age incidence in the morbidity and mortality in twenty-thousand cases. JAMA, 104: 1986, 1935.
4. Woodbury, R. M.: The relation between breast and artificial feeding and infant mortality. Amer. J. Hygiene, 2:668, 1922.
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