RT Journal Article SR Electronic T1 Setting up a specific surveillance system of community health during mass gatherings JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 683 OP 684 DO 10.1136/jech.55.9.683 VO 55 IS 9 A1 Hanslik, T A1 Boelle, P Y A1 Flahault, A YR 2001 UL http://jech.bmj.com/content/55/9/683.abstract AB