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...., He, Q., Barkoff A.M., Ertsola J., Gissman S, Bacci S., and European Bordetella expert group(EUpertstrain) , Euro.Surveill., 0/0/2012, Volume 17, p.32, (2012)