**Author details**

Eduardo Keller Saadi1,2,3, Rui Almeida4,5,6 and Alexandre do Canto Zago1,2,7

1 Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil

2 Federal University of Rio Grande do Sul Hospital, Porto Alegre, RS, Brazil

3 Mãe de Deus Hospital, Porto Alegre, RS, Brazil

4 West Paraná State University, Cascavel, PR, Brazil

