Schwarz KB, Haber BH, Rosenthal P, Mack CL, Moore J, Bove K, Bezerra JA, Karpen SJ, Kerkar N, Shneider BL, Turmelle YP, Whitington PF, Molleston JP, Murray KF, Ng VL, Romero R, Wang KS, Sokol RJ, Magee JC. Extrahepatic anomalies in infants with biliary atresia: results of a large prospective North American multicenter study. Hepatology. 2013 Nov; 58(5):1724-31.