Costa, C., Teixeira-Sousa, V., Costa, A., Reis, C., Grangeia, R. and Coelho, R. 2009. Impact of psychosocial factors on heart valve surgery. Acta Médica Portuguesa. 21, 6 (Mar. 2009), 601–606. DOI:https://doi.org/10.20344/amp.817.