The research pharmacy at the CHU de Quebec - Laval University will be responsible for preparing the study drug. The active medication or the placebo (sugar) will be encapsulated using identical capsules. The research pharmacy at the coordinating center will provide the study drug and the placebo to the other participating centers. There will be a quality control of the capsules; a temperature monitor will be in the boxes sent to the other centers and a control on the expiration date will be made. The capsules that are not used will be destroyed at each center. The randomization will be kept at the CHU de Quebec - Laval University research center. Patients will be stratified by center.