1 H&TRC-Health & Technology Research Center, ESTeSL-Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, 1990-096 Lisbon, Portugal.
2 NOVA National School of Public Health, Public Health Research Centre, Universidade NOVA de Lisboa, 1990-096 Lisbon, Portugal.
3 Comprehensive Health Research Center (CHRC), 1169-056 Lisbon, Portugal.