CONFLICTS OF INTEREST The authors declare that they have no conflicts of interest. Supporting Information Filename Description jsfa70186-sup-0001-supinfo.docxWord 2007 document , 357.8 KB Figure S1. Cultured primary mammary epithelial cells (×100). Figure S2. Immunofluorescence of cytokeratin 18 (CK-18) (×200). Table S1. Detailed information of the antibodies used in the present study. REFERENCES 1, , , and , Size distribution of fat globules in human colostrum, breast milk, and infant formula.