About the Authors

Zitta B. Harboe

Contributed equally to this work with: Zitta B. Harboe, Palle Valentiner-Branth

zit@ssi.dk

Affiliation Neisseria and Streptococcus Reference Center, Department of Microbiology and Infection Control, Statens Serum Institut (SSI), Copenhagen, Denmark

Palle Valentiner-Branth

Contributed equally to this work with: Zitta B. Harboe, Palle Valentiner-Branth

Affiliation Department of Infectious Disease Epidemiology, Statens Serum Institut (SSI), Copenhagen, Denmark

Helene Ingels

Affiliation Neisseria and Streptococcus Reference Center, Department of Microbiology and Infection Control, Statens Serum Institut (SSI), Copenhagen, Denmark

Jeppe N. Rasmussen

Affiliation Department of Infectious Disease Epidemiology, Statens Serum Institut (SSI), Copenhagen, Denmark

Peter H. S. Andersen

Affiliation Department of Infectious Disease Epidemiology, Statens Serum Institut (SSI), Copenhagen, Denmark

Catherine C. Bjerre

Affiliation Department of Infectious Disease Epidemiology, Statens Serum Institut (SSI), Copenhagen, Denmark

David Goldblatt

Affiliation Immunobiology Unit, University College London Institute of Child Health, London, United Kingdom

Lindsey Ashton

Affiliation Immunobiology Unit, University College London Institute of Child Health, London, United Kingdom

Mitch Haston

Affiliation Immunobiology Unit, University College London Institute of Child Health, London, United Kingdom

Helle B. Konradsen

Affiliation Neisseria and Streptococcus Reference Center, Department of Microbiology and Infection Control, Statens Serum Institut (SSI), Copenhagen, Denmark

Lotte Lambertsen

Affiliation Neisseria and Streptococcus Reference Center, Department of Microbiology and Infection Control, Statens Serum Institut (SSI), Copenhagen, Denmark

on behalf of the Danish Pneumococcal Surveillance Collaborating Group

Membership of the Danish Pneumococcal Surveillance Collaborating Group is provided in the Acknowledgments.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Culture, identification and submission of isolates and clinical samples from the departments of clinical microbiology across the country to the Neisseria and Streptococci Reference Center, Statens Serum Institut: Danish Pneumococcal Surveillance Collaborating Group. Conceived and designed the experiments: ZBH PVB PHA DG HBK LL. Performed the experiments: ZBH PVB HI PHA JNR DG LA MH LL HBK. Analyzed the data: ZBH PVB HI JNR PHA CCB DG LA MH HBK LL. Contributed reagents/materials/analysis tools: Danish Pneumococcal Surveillance Collaborating Group. Wrote the paper: ZBH PVB.