J. R. M. de Campos, M. H. Fonseca, E. de C. Werebe, M. C. P. Velhote, and F. B. Jatene, “ Technical modification of the Nuss operation for the correction of pectus excavatum ”, Clinics, vol. 61, no. 2, pp. 185–186, Apr. 2006, doi: 10.1590/S1807-59322006000200018.