Maybe someone else can respond in more detail to this, but at the Rush
Conference on Breast Cancer and Breastfeeding, this study was mentioned.  One
attendee stood up and stated that she had participated in this Harvard study
and the only questions they were asked were "Have you ever breastfed?" and
"How long did you breastfeed?"  Obviously, there are a great many limitations
to the conclusions of this study if that is the only information they are
using.
Kris Rogers, RN, BSN, IBCLC
Crystal Lake, IL