title: A black femoral head.
authors.affiliation: Rheumatology Unit, Department of Clinical Medicine and Immunological Science, University of Siena, Policlinico Le Scotte, Siena 53100, Italy.
authors.forename: Enrico
authors.initials: E
authors.lastname: Selvi
authors.forename: Roberta
authors.initials: R
authors.lastname: Maggio
authors.forename: Estrella Garcia
authors.initials: EG
authors.lastname: Gonzalez
authors.forename: Marco
authors.initials: M
authors.lastname: Bardelli