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2. The effect of the Danish Heart Society's blood-pressure campaign in 1975 as seen from general practice;Backer;Ugeskr. Laeg.,1976
3. The blood pressure in a population;Bøe;Acta med. scand.,1957
4. The Stockholm prospective study I.;Carlson;Acta med. scand.,1968
5. Semicontinuous screening of a whole community for hypertension;Hart;Lancet,1970