V Chaar, L Keclard, JP Diara, C Leturdu, J Elion, R Krishnamoorthy, J Clayton, M Romana. Association of UGT1A1 polymorphism with prevalence and age at onset of cholelithiasis in sickle cell anemia. Haematologica 2005;90(2):188-199; https://doi.org/10.3324/%x.