Of the remaining 15 patients (16.5%), 9 were diagnosed with acute cholecystitis by the HBS protocol, and the other 6 were diagnosed as having chronic cholecystitis by the use of either Morphine Sulfate (MSO4) or Sincalide, a synthetic C-terminal octapeptide of cholecystokinin (CCK-8). Here, CCK is linked to Cholecystitis, Acute.