Total and caspase-cleaved cytokeratin 18 in chronic cholecystitis: a prospective study. - Simopoulos C; Tsaroucha AK; Asimakopoulos B; Giatromanolaki A; Gavriilidis P; Polychronidis A; Karayiannakis A; Simopoulos, Constantinos; Tsaroucha, Alexandra K; Asimakopoulos, Byron; Giatromanolaki, Alexandra; Gavriilidis, Paschalis; et al. (BMC Gastroenterology, 2008)