Ray CE, Lorenz JM, Burke CT, Darcy MD, Fidelman N, Greene FL, Hohenwalter EJ, Kinney TB, Kolbeck KJ, Kostelic JK, Kouri BE, Nair AV, Owens CA, Rochon PJ, Rockey DC, Vatakencherry G. ACR Appropriateness Criteria radiologic management of benign and malignant biliary obstruction. J Am Coll Radiol. 2013 Aug; 10(8):567-74.