“…In 1951 nearly 4000 longshoremen (dockers) were examined by a multiple screening technique in San Francisco. 32 In 1960 the mortality and morbidity of the original group (of whom the records for over 3000 were available) were followed up and a repeat examination was given to a sample of 818 persons. In the 1951 screening (which included hearing and vision tests, 70-mm chest X-ray, ECG, blood pressure, serology for syphilis, haemoglobin estimation, urinary albumin test, post-prandial glucose tolerance test, measurement of height and weight and a self-administered questionary), 63% of persons examined had positive tests, which led to the finding of 35% with clinical disease.…”