1. Imported malaria in the UK: advice given by general practitioners to British residents travelling to malaria endemic areas;Campbell, H.;JR CoU Gen Pract,1987
2. Imported malaria in Britain: survey of British residents travelling to areas in which malaria is endemic;Campbell, J.H.;BrMedJ,1985
3. Malaria prophylaxis: survey ofthe response of British travellers to prophylactic advice;Phillips-Howard, P.A.; Blaze, M.; Hurn, M.; Bradley, D.J.;BrMedJ,1986
4. Investigating non-response bias in mail surveys;Sheikh, K.; Mattingly, S.;J Epidemiol Community Health,1981
5. Professionals as responders: variations in and effects of response rates to questionnaires, 1961-77;Cartwright, A.;BrMedJ,1978