“Epidemiology and aetiology of influenza-like illness among households in metropolitan Vientiane, Lao PDR”: A prospective, community-based cohort study by Rudge, J, Inthalaphone, N, Pavlicek, R, Paboriboune, P, Flaissier, B, Monidarin, C, Steenkeste, N, Davong, V, Vongsouvath, M, Bonath, K, Messaoudi, M, Saadatian-Elahi, M, Newton, P, Endtz, H, Dance, D, Paranhos Baccala, G, Sanchez Picot, V