Griniatsos J, Petrou A, Pappas P, Revenas K, Karavokyros I, Michail OP, Tsigris C, Giannopoulos A, Felekouras E. Percutaneous cholecystostomy without interval cholecystectomy as definitive treatment of acute cholecystitis in elderly and critically ill patients. South Med J. 2008;101(6):586-90.