8Crandall M, Lammers C, Senders C, et al. Initial validation of a numerle zero to ten scale to measure childern's state anxiety. Anesth Analg ,2007,105 ( 5 ) : 1250-1253.
9Aguilera IM, Palel D, Maeakin GH, et al. Perioperative anxiety and postoperative behaviours disturbances or inhalation induction of an- aesthesia. Paediatr Anaseth ,2008,13 (6) :501-507.
10da Silveira EB, I.am E, Martel M, et al. The importance of process issues as predictors of time to endoscopy in patients with acute up- per-GI bleeding using the RUGBE data. Gastrointest Endosc, 2006,64(3 ) :299-309.
