Dear Alicia,
The reference given in Ruth Lawrence's publication, A review of the medical
benefits and contraindications to breastfeeding in the United States, is:
Koletzko, S., Sherman, P., Corey, M., Griffiths, A., & Smith, C. (1989).
Role of infant feeding practices in development of Crohn's Disease in
childhood. BMJ, 298, 1617-1618.
Good luck!
Barrett Dunn
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