title: Reply.
authors.affiliation: New York University School of Medicine and Hospital for Joint Diseases, New York, NY.
authors.forename: Jose U
authors.initials: JU
authors.lastname: Scher
authors.affiliation: New York University School of Medicine and Hospital for Joint Diseases, New York, NY.
authors.forename: Steven B
authors.initials: SB
authors.lastname: Abramson