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Moura A, Barros PP.Moura A, et al. Among authors: barros pp.Acta Med Port. 2018 Dec 28;31(12):730-737. doi: 10.20344/amp.9873. Epub 2018 Dec 28.Acta Med Port. 2018.PMID: 30684370Free article.Portuguese.
Moura A, Barros PP.Moura A, et al. Among authors: barros pp.Health Econ. 2020 Aug;29(8):865-877. doi: 10.1002/hec.4109. Epub 2020 Jun 8.Health Econ. 2020.PMID: 32515019Free PMC article.