Amaral, F. ., Manso, P. ., Schmidt, A. ., Sgarbieri, R. ., Vicente, W. ., Junior, C. ., & Somerville, J. . (1969). Recommendations for starting a grown up congenital heart disease (GUCH) unit. Revista Brasileira De Cirurgia Cardiovascular : Orgao Oficial Da Sociedade Brasileira De Cirurgia Cardiovascular, 30(3), 373-9. https://doi.org/10.5935/1678-9741.20150037 (Original work published 1969)