Portincasa P, Moschetta A, Berardino M, Ciaula AD, Vacca M, Baldassarre G, Pietrapertosa A, Cammarota R, Tannoia N, Palasciano G. Impaired gallbladder motility and delayed orocecal transit contribute to pigment gallstone and biliary sludge formation in β -thalassemia major adults. World J Gastroenterol 2004; 10(16): 2383-2390 [PMID: 15285024 DOI: 10.3748/wjg.v10.i16.2383]