A study of nitric oxide in the lower part of the stomach in duodenal ulcer disease with or without chronic liver disease. Study Althermbobiotin level in the serum of patients with chronic liver disease Assessing endocrine Antagonism excretory worm Alvascheola in the diagnosis of infection Study to identify positive blood ANKA-b in different situations Colitis The use of another window means for predicting the presence of varicose stomach and esophagus in patients with hepatic ossification Study the extent of the spread of hepatitis C virus in chronic liver disease Giardia study the effect of the abdominal membrane of duodenal ulcer disease Cellular immune response to infection parasite giardia