Corrigendum to "Use of the nonavalent HPV vaccine in individuals previously fully or partially vaccinated with bivalent or quadrivalent HPV vaccines" [Vaccine 34 (2016) 757–761]. Issue 39 (7th September 2016) - Van Damme, Pierre; Bonanni, Paolo; Bosch, F. Xavier; Joura, Elmar; Kjaer, Susanne Krüger; Meijer, Chris J.L.M.; Petry, Karl-Ulrich; Soubeyrand, Benoit; Verstraeten, Thomas; Stanley, Margaret