Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Robert Cohen received personal fees and non-financial support from GSK, Merck, MSD, Pfizer, Sanofi, AstraZeneca outside the submitted work. Odile Launay received personal fees and non-financial support from GSK, MSD, Pfizer, Sanofi, and Janssen outside the submitted work. Catherine Weil-Olivier received personal fees and non-financial support from GSK, MSD, Pfizer, Sanofi, AstraZeneca, Sequirus, Janssen and Novartis outside the submitted work. Pierre Bakhache(:) received personal fees and non-financial support from GSK, Merck, MSD, Pfizer and Sanofi, outside the submitted work. Marie-Aliette Dommergues received personal fees and non-financial support from GSK, Merck, MSD, Pfizer and Sanofi, outside the submitted work. Véronique Dufour received personal fees and non-financial support from GSK, Merck, MSD, Pfizer, Sanofi and AstraZeneca outside the submitted work. Joël Gaudelus received personal fees and non-financial support from GSK, Merck, MSD, Pfizer, Sanofi, AstraZeneca, and Novartis outside the submitted work. Isabelle Hau received personal fees and non-financial support from GSK, Merck, MSD, Pfizer and Sanofi, outside the submitted work. Didier Pinquier received personal fees and non-financial support from AstraZeneca, GSK, MSD, Pfizer and Sanofi, outside the submitted work. Georges Thiebault received personal fees and non-financial support from GSK, MSD and Pfizer outside the submitted work. Franck Thollot received personal fees and non-financial support from GSK, MSD, Pfizer and Sanofi, outside the submitted work. François Vie le Sage received personal fees and non-financial support from MSD, outside the submitted work. Corinne Levy received personal fees and non-financial support from Merck, MSD, Pfizer, outside the submitted work. Maeva Lefevre received personal fees and non-financial support from Sanofi, Janssen and AstraZeneca outside the submitted work. Hervé Haas received personal fees and non-financial support from GSK, UPSA, MSD, Pfizer and Sanofi outside the submitted work.