Erratum to: J Mammary Gland Biol Neoplasia (2015) 20:159–172

DOI 10.1007/s10911-015-9338-z

Since the publication of this article, the authors have identified an inadvertent error in the Results section of this article.

As noted in the Methods and Discussion sections, exclusive breast feeding was not part of the study design. Therefore, the first sentence of the Results section should read as follows.

Samples of breast milk from breastfeeding women (n = 54) were collected at ~4 months of lactation.

The authors wish to apologize to readers for this error.