title: Erratum to: A prospective evaluation of ultrasound as a diagnostic tool in acute microcrystalline arthritis.
authors.affiliation: Department of Rheumatology, Département de l'appareil locomoteur, Lausanne University Hospital (CHUV), Av Pierre Decker 5, Lausanne, 1011, Switzerland. Pascal.zufferey@chuv.ch.
authors.forename: Pascal
authors.initials: P
authors.lastname: Zufferey
authors.affiliation: Department of Rheumatology, Département de l'appareil locomoteur, Lausanne University Hospital (CHUV), Av Pierre Decker 5, Lausanne, 1011, Switzerland.
authors.forename: Roxana
authors.initials: R
authors.lastname: Valcov
authors.affiliation: Department of Rheumatology, Département de l'appareil locomoteur, Lausanne University Hospital (CHUV), Av Pierre Decker 5, Lausanne, 1011, Switzerland.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Fabreguet
authors.affiliation: Department of Rheumatology, Département de l'appareil locomoteur, Lausanne University Hospital (CHUV), Av Pierre Decker 5, Lausanne, 1011, Switzerland.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Dumusc
authors.affiliation: Departement de l'appareil locomoteur, Lausanne University Hospital (CHUV), Av Pierre Decker 5, Lausanne, 1011, Switzerland.
authors.forename: Patrick
authors.initials: P
authors.lastname: Omoumi
authors.affiliation: Department of Rheumatology, Département de l'appareil locomoteur, Lausanne University Hospital (CHUV), Av Pierre Decker 5, Lausanne, 1011, Switzerland.
authors.forename: Alexander
authors.initials: A
authors.lastname: So