1Kirpichnikov D, McFarlane SI, Sowers JR. Metformin: an update[J]. Ann Intem Med, 2002,137 : 25-33.
2UK Prospective Diabetes Study(U KPDS) Group. Effect of intensive blood-glu- cose control with mefformin on complications in overweight patients with type 2 diabetes(U KPDS 34)[J]. Lancet, 1998,352: 854-865.
3Li J, Jin Y, Wang TY, et al. Relative bioavailability and bioequivalence of metforphin hydrochloride extended-re-leased and immediate-released tablets in heahhv Chinese volunteersIJ1. Eur J Dru~ Metab Pharmacokinet, 2007,32:21-28.