Lithogenic dyslipidemia and ABCG5/ABCG8 gene polymorphisms: a study in 121 siblings with gallstones - Grünhage, F; Tirziu, S; Ciocan, A; Bel, S; Keppeler, H; Lammert, F; Acalovski, M (Zeitschrift für Gastroenterologie, 2007)