Cantarelli, PietroDebin, MarionTurbelin, ClémentPoletto, ChiaraBlanchon, ThierryFalchi, AlessandraHanslik, ThomasBonmarin, IsabelleLevy-Bruhl, DanielMicheletti, AlessandraPaolotti, DanielaVespignani, AlessandroEdmunds, JohnEames, KenSmallenburg, RonaldKoppeschaar, CarlFranco, Ana OFaustino, VitorCarnahan, AnnaSaraRehn, MoaColizza, Vittoria2015-09-292015-09-292014-09-20http://hdl.handle.net/10400.7/324The Internet is becoming more commonly used as a tool for disease surveillance. Similarly to other surveillance systems and to studies using online data collection, Internet-based surveillance will have biases in participation, affecting the generalizability of the results. Here we quantify the participation biases of Influenzanet, an ongoing European-wide network of Internet-based participatory surveillance systems for influenza-like-illness.engInfluenzaSurveillanceRepresentativenessInternet data collectionParticipation biasSelection biasjournal article10.1186/1471-2458-14-98410.1186/1471-2458-14-984