Table 2. Procedures included in the study (inclusion criteria).

PTC: percutaneous transhepatic cholangiography; ERCP: endoscopic retrograde cholangiopancreatography; CT: computed tomography.

S. No.	Procedure
1	PTC + external drain
2	Biliary stent
3	ERCP
4	Colonic stent
5	Duodenal stent
6	Oesophageal stent/dilatation
7	Radiologically inserted gastrostomy/exchange
8	Nephrostomy insertion/exchange
9	Ureteric stent
10	Ascitic drain
11	Chest drain
12	Ultrasound/CT-guided biopsy (liver/omental/lymph node/breast/bone)