| CI | Confidence interval |
| ERCP | Endoscopic retrograde cholangiopancreatography |
| IQR | Interquartile ranges |
| OR | Odds ratio |
| RCT | Randomized controlled trial |
| SO | Sphincter of Oddi |
| SPS | Suprapapillary stent |
| SEMS | Self-expandable metallic stent |
| TPS | Transpapillary stent |
| WMD | Weighted mean difference |
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