in order to prospectively determine the effect of gastrectomy with or without enterogastric reflux on serum pepsinogen concentrations , serum pepsinogen a , serum pepsinogen c and the pepsinogen a : c ratio were measured before , and 10 days and 6 , 15 and 24 months after 2/3-3/4 distal gastrectomy in peptic ulcer patients with primary roux-en-y diversion ( n = 11 ) or billroth ii reconstruction ( n = 11 ) .
C0030913
pepsinogen
C0077923
pepsinogen a