Author Contributions: Dr Kac had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Kac, Grohs, Guillemain, and Meyer. Acquisition of data: Kac, Gueneret, Rodi, Boiron, and Leglise. Analysis and interpretation of data: Kac, Grohs, Durieux, Trinquart, and Meyer. Drafting of the manuscript: Kac, Grohs, Durieux, Gueneret, Rodi, Boiron, Guillemain, and Leglise. Critical revision of the manuscript for important intellectual content: Kac, Trinquart, and Meyer. Statistical analysis: Durieux and Trinquart. Administrative, technical, and material support: Grohs, Boiron, Guillemain, and Leglise. Study supervision: Kac and Meyer.