Citation style for this article:He Q, Barkoff AM, Mertsola J, Glismann S, Bacci S, on behalf of the European Bordetella expert group (EUpertstrain), the European surveillance network for vaccine-preventable diseases (EUVAC.NET). High heterogeneity in methods used for the laboratory confirmation of pertussis diagnosis among European countries, 2010: integration of epidemiological and laboratory surveillance must include standardisation of methodologies and quality assurance .