Found the citation I was talking about.

Effect of Environmental Conditions on Unpasteurized Donor Human Milk
David J. Rechtman, Martin L. Lee, H. Berg. Breastfeeding Medicine. 
Spring 2006, 1(1): 24-26. doi:10.1089/bfm.2006.1.24.
Published in Volume: 1 Issue 1: March 30, 2006

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