Andrade Fernanda Duarte, Bender Ana Lígia, da Silveira Inês Guimarães, Stein Helga, von Mühlen Carlos Alberto, Staub Henrique Luiz
Rheumatology Department, São Lucas Hospital, Faculty of Medicine of Pontiphical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.
Clin Rheumatol. 2009 Dec;28(12):1441-2. doi: 10.1007/s10067-009-1255-3. Epub 2009 Aug 30.