On 2014 Feb 02, Susan Love commented:

While this is an interesting contribution to the field it is limited in that only one duct was lavaged per woman most often the one with NAF. Unfortunately we don't really know the etiology of NAF (recent work from Khan's group suggest it is associated with high prolactin. In recent work which is as of yet unpublished we have found that levels are different ducts. There is still much work that needs to be done to understand the physiology of the breast!

On 2014 Feb 02, Susan Love commented:

While this is an interesting contribution to the field it is limited in that only one duct was lavaged per woman most often the one with NAF. Unfortunately we don't really know the etiology of NAF (recent work from Khan's group suggest it is associated with high prolactin. In recent work which is as of yet unpublished we have found that levels are different ducts. There is still much work that needs to be done to understand the physiology of the breast!