This paper is in the following e-collections/theme issues:

Infodemiology and Infoveillance  Public (e)Health  Public Health 

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Works citing "Performance of eHealth Data Sources in Local Influenza Surveillance: A 5-Year Open Cohort Study"

Toomas Timpka, Armin Spreco, Örjan Dahlström, Olle Eriksson, Elin Gursky, Joakim Ekberg, Eva Blomqvist, Magnus Strömgren, David Karlsson, Henrik Eriksson, James Nyce, Jorma Hinkula, Einar Holm
J Med Internet Res 2014 (Apr 28); 16(4):e116 

According to Crossref, the following articles are citing this article (DOI 10.2196/jmir.3099):

(note that this is only a small subset of citations)

1. Al-Tawfiq JA, Zumla A, Gautret P, Gray GC, Hui DS, Al-Rabeeah AA, Memish ZA. Surveillance for emerging respiratory viruses. The Lancet Infectious Diseases 2014; [CrossRef]