Enserink, RMeijer, ADijkstra, Fvan Benthem, Bvan der Steen, JTHaenen, Avan Delden, HCools, Hvan der Sande, MVeldman-Ariesen, MJ2025-03-202025-03-2020112209196310.1111/j.1532-5415.2011.03715.xhttps://rivm.openrepository.com/handle/10029/644982Absence of influenza A(H1N1) during seasonal and pandemic seasons in a sentinel nursing home surveillance network in the NetherlandsArticleJ Am Geriatr Soc 2011; 59(12):2301-52025-03-20