- Correspondence to Jeanne Tamarelle, Biostatistics, Biomathematics, Pharmacoepidemiology, and Infectious Diseases, Institut Pasteur, Montigny-le-Bretonneux 78180, France;
- Received 11 July 2017
- Revised 9 November 2017
- Accepted 10 December 2017
- Published online 22 January 2018.
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