Analysing trends and forecasting malaria epidemics in Madagascar using a sentinel surveillance network: a web-based application Girond F, Randrianasolo L, Randriamampionona L, Rakotomanana F, Randrianarivelojosia M, Ratsitorahina M, Brou TY, Herbreteau V, Mangeas M, Zigiumugabe S, Hedje J, Rogier C, Piola P Malaria Journal 16 (2017)