title: Reply.
authors.affiliation: Children's Hospital of Philadelphia, Philadelphia, PA.
authors.forename: Pamela F
authors.initials: PF
authors.lastname: Weiss
authors.affiliation: Children's Hospital of Philadelphia, Philadelphia, PA.
authors.forename: Arastoo
authors.initials: A
authors.lastname: Vossough
authors.affiliation: Children's Hospital of Philadelphia, Philadelphia, PA.
authors.forename: Nancy A
authors.initials: NA
authors.lastname: Chauvin
mesh_terms: D003287:Contrast Media; D005260:Female; D005682:Gadolinium; D006801:Humans; D008297:Male; D058566:Sacroiliitis / Q000175:diagnosis*; D025242:Spondylarthropathies / Q000175:diagnosis*; D013585:Synovitis / Q000175:diagnosis*
chemical_list: D003287:Contrast Media; D005682:Gadolinium