1.   Serum pepsinogen I was measured in the sample taken immediately before starting the meal by the commercial radioimmunoassay kit manufactured by Incstar Ltd.

2.   Serum pepsinogen I shows little response to eating.

3.   Serum pepsinogen I was measured using commercial radioimmunassay kits obtained from Incstar Ltd.

4.   High values of serum pepsinogen A have also been found during omeprazole treatment.

5.   Serum pepsinogen A and pepsinogen C were measured by sensitive and specific radioimmunoassays as described previously.

6.   Values of serum pepsinogens are given as means and standard deviations.

7.   High values of serum pepsinogen C were frequently found in all groups of patients with hyperpepsinogenaemia A.