extremely significantP < 0.00005
SALINAS TABLE III.-Number of sera in each patient group with tumour-marker elevations Tumour marker l I SA 1 (3%) 4 (33%) 16 (94%) AGP 1 (3%) 1 (8%) 11 (64%) AAT 0 0 13 (76%) HPT 1 (3%) 0 7 (41%) AMG 0 2 (17%) 1 (6%) Abbreviations: as in Table II. extremely significant (F = 73 6 with 3 and 117 degrees of freedom, P < 0.00005).