1Department of Microbiological Diagnostics and Virology, Statens Serum Institut, Copenhagen, Denmark
2Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
3Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
4Department of Infectious Disease Epidemiology, Statens Serum Institut, Copenhagen, Denmark
5Department of Gastroenterology, Hvidovre University Hospital, Hvidovre, Denmark
6Department of Clinical Microbiology, Hvidovre University Hospital, Hvidovre, Denmark
7Department of Clinical Epidemiology, University of Aalborg, Aalborg, Denmark
Correspondence: Bjørn Kantsø, MSc, Department of Microbiological Diagnostics and Virology, Statens Serum Institut, Artillerivej 5, Copenhagen DK-2300, Denmark. E-mail: [email protected]
SUPPLEMENTARY MATERIAL accompanies this paper at http://links.lww.com/AJG/B138
Received 26 February 2015; accepted 28 July 2015
Guarantor of the article: Bjørn Kantsø, MSc.
Specific author contributions: B.K. initiated the study. J.S. performed statistical analyses, designed the study, and collected data. S.H. provided data on IPD. All authors were involved in planning the study and in the interpretation of findings. B.K. drafted the manuscript, which was critically revised by all co-authors. All authors contributed to the final manuscript.
Financial support: The A.P. Møller Foundation for the Advancement of Medical Science kindly supported this study.
Potential competing interests: None.