4Jadad AR,Moore RA,Carroll D,et al.Assessing the quality of reports of randomized clinical trials:is blinding necessary? Control Clin Trials,1996,17:1-12.
5Banares R,Albillos A,Rinc6n D,et al.Endoscopic treatment versus endoscopic plus pharmacologic treatment for acute variceal bleeding:a meta-analysis.Hepatology,2002,35:609-615.
6Durkan AM,Hodson EM,Willis NS,et al.Immunosuppressive agents in childhood nephrotic syndrome:A meta-analysis of randomized controlled trials.Kidney Int,2001,59:1919-1927.
7Ponticelli C,Edefonti A,Ghio L,et al.Cyclosporin versus cyclophosphamide for patients with steroid-dependent and frequently relapsing idiopathic nephrotic syndrome:a multicentre randomized controlled trial.Nephrol Dial Transplant,1993,8:1326-1332.
8McCrory WW,Shibuya M,Lu WH,et al.Therapeutic and toxic effects observed with different dosage programs of cyclophosphamide in treatment of steroid-responsive but frequently relapsing nephrotic syndrome.J Pediatr,1973,82:614-618.
2de Franchis R,Primignani M.Why do varices bleed? Gastroenterol Clin North Am 1992; 21:85-101
3Jadad AR,Moore RA,Carroll D,Jenkinson C,Reynolds DJ,Gavaghan DJ,McQuay HJ.Assessing the quality of reports of randomized clinical trials:is blinding necessary? Control Clin Trials 1996; 17:1-12
4Hou MC,Lin HC,Lee FY,Chang FY,Lee SD.Recurrence of esophageal varices following endoscopic treatment and its impact on rebleeding:comparison of sclerotherapy and ligation.J Hepatol 2000; 32:202-208
5Lo GH,Lai KH,Cheng JS,Hwu JH,Chang CF,Chen SM,Chiang HT.A prospective,randomized trial of sclerotherapy versus ligation in the management of bleeding esophageal varices.Hepatology 1995; 22:466-471
6Laine L,el-Newihi HM,Migikovsky B,Sloane R,Garcia F.Endoscopic ligation compared with sclerotherapy for the treatment of bleeding esophageal varices.Ann Intern Med 1993; 119:1-7
7Stiegmann GV,Goff JS,Michaletz-Onody PA,Korula J,Lieberman D,Saeed ZA,Reveille RM,Sun JH,Lowenstein SR.Endoscopic sclerotherapy as compared with endoscopic ligation for bleeding esophageal varices.N Engl J Med 1992; 326:1527-1532
8Gimson AE,Ramage JK,Panos MZ,Hayllar K,Harrison PM,Williams R,Westaby D.Randomised trial of variceal banding ligation versus injection sclerotherapy for bleeding oesophageal varices.Lancet 1993; 342:391-394
9Baroncini D,Milandri GL,Borioni D,Piemontese A,Cennamo V,Billi P,Dal Monte PP,D'Imperio N.A prospective randomized trial of sclerotherapy versus ligation in the elective treatment of bleeding esophageal varices.Endoscopy 1997; 29:235-240
10Sackett DL,Straus SE,Richardson WS,et al.Evidence-based medicine:how to practice and teach EBM.2nd edition,Churchill Livingstone,London.2000.
