Acknowledgement
The authors thank the patients, their families, and the study investigator who took part in this study. In addition to the authors, the following investigators participated in the study: Jean-Jacques Barbeau, Pierre Bélanger, Caroline Champagne, Benoit Deschamps, Lief Destrade Sosa, Martine Gobeil, Marie-Christine Godin, Geneviève Ostiguy, Idania Teresa Garcia Del Sol, François Saint-Maurice, Luc Tremblay, Susan Mcvety and Isabelle Boisclair. The author also thanks Jean Couture, Marie-Eve Coulombe and Amelie Racicot for the statistical analysis of the data.