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Participant flow diagram. Each woman contributed 2 milk samples, one from each collection method. One participant pumped in the opposite order of her randomly assigned assignment. All samples were analyzed by intention-to-treat analysis. HM, human milk; HM + CF, human milk and complementary foods; ITT, intention to-treat; OWN SUPP, personal electric breast pump and milk collection kits; STER SUPP, hospital-grade pump and new, sterile collection kits.
