About the Authors

Roland Zahn
Gert Gillisen
Anna Roos
Marina Koning
Esmeralda van der Helm
Dirk Spek
Mo Weijtens
Maria Grazia Pau
Katarina Radošević
Gerrit Jan Weverling
Jerome Custers
Jort Vellinga
Hanneke Schuitemaker
Jaap Goudsmit
Ariane Rodríguez

Ariane.Rodriquez@crucell.com

Affiliation Crucell Holland BV, Leiden, The Netherlands

Competing Interests

The authors state that they have a financial interest. The authors are employees of Crucell Holland BV. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: RZ A. Rodríguez KR MGP. Performed the experiments: RZ GG A. Roos. Analyzed the data: RZ GG A. Roos GJW. Contributed reagents/materials/analysis tools: JC JV EvdH MK DS. Wrote the paper: RZ A. Rodríguez HS JG MW.