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NMA did not show statistically significant differences to favor any one intervention with certainty across all the outcomes. The overall certainty of evidence was found to be low to very low for all the outcomes. The available evidence did not favor any intervention for drainage of malignant biliary obstruction across all the outcomes assessed. ERCP with or without EUS should be considered first to allow simultaneous tissue acquisition and biliary drainage. The available evidence did not favor any intervention for drainage of malignant