title: Reply to D.W. Felsher et al.
authors.affiliation: Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, and Partners In Health, Boston, MA lawrence.shulman@uphs.upenn.edu.
authors.forename: Lawrence N
authors.initials: LN
authors.lastname: Shulman
authors.affiliation: Union for International Cancer Control, Geneva, Switzerland, and Harvard Medical School, Boston, MA.
authors.forename: Claire M
authors.initials: CM
authors.lastname: Wagner
authors.affiliation: Union for International Cancer Control, Geneva, Switzerland.
authors.forename: Julie
authors.initials: J
authors.lastname: Torode