Safety and feasibility of maximal physical testing in rheumatic diseases: a cross-sectional study with 5,910 assessments - Ferraz, Rodrigo Branco de Araújo Silveira; Gualano, Bruno; Merege-Filho, Carlos Alberto Abujabra; Almeida, Murilo Groschitz Ruas; Perandini, Luiz Augusto; Dassouki, Thalita Blasques; Pinto, Ana Lúcia de Sá; Lima, Fernanda Rodrigues; Roschel, Hamilton (Rheumatology international, 2015)