Ciconelli, Rozana Mesquita, Patrícia Coelho de Soárez, Clarissa Campos Guaragna Kowalski, and Marcos Bosi Ferraz. 2006. “The Brazilian Portuguese Version of the Work Productivity and Activity Impairment – General Health (WPAI-GH) Questionnaire”. São Paulo Medical Journal 124 (6):325-32. https://periodicosapm.emnuvens.com.br/spmj/article/view/2276.