1 Comprehensive Health Research Center. Public Health Research Centre. NOVA National School of Public Health. Universidade NOVA de Lisboa. Lisbon; EpiDoC Unit. Comprehensive Health Research Center. Public Health Research Centre. NOVA National School of Public Health. Universidade NOVA de Lisboa. Lisbon; Rheumatology Department. Centro Hospitalar do Baixo Vouga. Aveiro. Portugal.
2 Comprehensive Health Research Center. Public Health Research Centre. NOVA National School of Public Health. Universidade NOVA de Lisboa. Lisbon; School of Public Health. Imperial College London. London. United Kingdom; Nova School of Business and Economics. Universidade NOVA de Lisboa. Lisbon. Portugal.
3 Faculty of Health and Medicine. Lancaster University. Lancaster. United Kingdom.
4 EpiDoC Unit. Comprehensive Health Research Center. Public Health Research Centre. NOVA National School of Public Health. Universidade NOVA de Lisboa. Lisbon; Rheumatology Unit. Centro Hospitalar Universitário Lisboa Central. Lisbon. Portugal.
5 EpiDoC Unit. Comprehensive Health Research Center. Public Health Research Centre. NOVA National School of Public Health. Universidade NOVA de Lisboa. Lisbon; Rheumatology Unit. Hospital dos Lusíadas. Lisbon. Portugal.