Oseltamivir plus usual care versus usual care for influenza-like illness in primary care: an open-label, pragmatic, randomised controlled trial by Butler, CC, van der Velden, AW, Bongard, E, Saville, BR, Holmes, J, Coenen, S, Cook, J, Francis, NA, Lewis, RJ, Godycki-Cwirko, M, Llor, C, Chlabicz, S, Lionis, C, Seifert, B, Sundvall, P-D, Colliers, A, Aabenhus, R, Bjerrum, L, Harbin, NJ, Lindbæk, M, Glinz, D, Bucher, HC, Kovács, B, Jurgute, RR, Lundgren, PT, Little, P, Murphy, AW, De Sutter, A, Openshaw, P, de Jong, M, Connor, JT, Matheeussen, V, Ieven, M, Goossens, H, Verheij, TJ