Denardin, D., F. E. Savaris, A. C. da Cunha, R. da S. Betat, J. A. B. Telles, L. V. Targa, A. Weiss, P. R. G. Zen, and R. F. M. Rosa. “Retrospective Cohort of Trisomy 18 (Edwards Syndrome) in Southern Brazil”. São Paulo Medical Journal, vol. 133, no. 4, July 2015, pp. 320-5, https://periodicosapm.emnuvens.com.br/spmj/article/view/1457.