About the Authors

Pasquale Marrazzo

Affiliation GSK Vaccines S.r.l., via Fiorentina 1, 53100, Siena, Italy

Silvia Maccari

Affiliation GSK Vaccines S.r.l., via Fiorentina 1, 53100, Siena, Italy

Annarita Taddei

Affiliation Interdepartmental Centre for Electron Microscopy, Tuscia University, Viterbo, Italy

Luke Bevan

Affiliation Respiratory Disease Area, Novartis Institutes for BioMedical Research, Horsham, RH12 5AB, United Kingdom

John Telford

Affiliation GSK Vaccines S.r.l., via Fiorentina 1, 53100, Siena, Italy

Marco Soriani

alfredo.x.pezzicoli@gsk.com (AP); marco.x.soriani@gsk.com (MS)

Affiliation GSK Vaccines S.r.l., via Fiorentina 1, 53100, Siena, Italy

Alfredo Pezzicoli

alfredo.x.pezzicoli@gsk.com (AP); marco.x.soriani@gsk.com (MS)

Affiliation GSK Vaccines S.r.l., via Fiorentina 1, 53100, Siena, Italy

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PM AP. Performed the experiments: PM SM AT LB. Analyzed the data: JT MS. Wrote the paper: AP MS.