Viral Etiology of Common Cold in Children, Finland

1. Zilberberg MD, Shorr AF, Kollef MH. Increase in adult Clostridium diffi cile– related hospitalizations and case-fatality rate, United States, 2000–2005. Emerg Infect Dis. 2008;14:929–31. DOI: 10.3201/ eid1411.080337 2. Cohen SA, Naumova EN. Population dynamics in the elderly: the need for ageadjustment in national biosurveillance systems. In: Zeng D, Gotham I, Komatsu K, Lynch C, Thurmond M, Madigan D, et al., editors. Intelligence and security informatics: biosurveillance: Second NSF Workshop, BioSurveillance 2007; 2007 May 22; New Brunswick, NJ, USA. New York: Springer; 2007. p. 47–58. 3. Jagai JS, Parisi SM, Doshi MP, Naumova EN. Trends and seasonal patterns in hospitalization rates of Clostridium diffi cile in the US elderly. Washington: American Public Health Association; 2007. 4. Barlett JG. Clostridium diffi cile: old and new observations. J Clin Gastroenterol. 2007;41(Suppl 1):S24–9. 5. Burckhardt F, Friedrich A, Beier D, Eckmanns T. Clostridium diffi cile surveillance trends, Saxony, Germany. Emerg Infect Dis. 2008;14:691–2. 6. Wilcox M, Fawley W. Viral gastroenteritis increases the reports of Clostridium diffi cile infection. J Hosp Infect. 2007;66:395–6. DOI: 10.1016/j.jhin.2007.05.010 7. Zilberberg MD. Assessment of reporting bias for Clostridium diffi cile hospitalizations, United States. Emerg Infect Dis. 2008;14:1334. DOI: 10.3201/ eid1411.080337