Staub H L, Franck M, Ranzolin A, Norman G L, Iverson G M, von Mühlen C A
Rheumatology Department, Saint Lucas Hospital, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.
Autoimmun Rev. 2006 Dec;6(2):104-6. doi: 10.1016/j.autrev.2006.06.014. Epub 2006 Jul 24.