title: Comment on: Assessing surrogates as trial endpoints using mixed models.
authors.affiliation: Department of Mathematics, Bar Ilan University, Ramat Gan 52900, Israel.
authors.forename: Laurence
authors.initials: L
authors.lastname: Freedman
mesh_terms: D002985:Clinical Protocols; D002986:Clinical Trials as Topic / Q000379:methods*; D015658:HIV Infections / Q000188:drug therapy; D006801:Humans; D015233:Models, Statistical