endoscopic retrograde cholangiopancreatography (ERCP) usually involves:
1. cannulation of the hepatopanceatic ampulla
2. introduction of CMinto the common bile duct
3. introduction of barium directly into the duodenum
a. one only
a. 1 and 2 only
b. 1 and 3 only
c. 1,2 and 3
1. cannulation of the hepatopanceatic ampulla
2. introduction of CMinto the common bile duct
3. introduction of barium directly into the duodenum
a. one only
a. 1 and 2 only
b. 1 and 3 only
c. 1,2 and 3
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