Text and Data Mining valid from 2019-04-04
First Online: 4 April 2019
Compliance with Ethical Standards
: No external funding was used in the preparation of this manuscript.
: Didier Concordet, Peggy Gandia, Jean L. Montastruc, Alain Bousquet-Mélou, Peter Lees, Aude Ferran, and Pierre L. Toutain declare that they have no potential conflicts of interest that might be relevant to the contents of this manuscript
: PG retrieved and validated raw data, AF validated raw data, DC performed the statistical analysis, and PLT and DC drafted the articles. All co-authors critically reviewed several drafts of the manuscript.