title: The authors reply.
authors.affiliation: Institute for Health and the Environment, State University of New York, University at Albany, Rensselaer, NY.
authors.forename: Louise-Anne
authors.initials: LA
authors.lastname: McNutt
authors.forename: Chuntao
authors.initials: C
authors.lastname: Wu
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Xue
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Hafner
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D016017:Odds Ratio; D017063:Outcome Assessment, Health Care / Q000379:methods*; D012306:Risk