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. Author manuscript; available in PMC: 2011 Oct 12.
Published in final edited form as: Cochrane Database Syst Rev. 2009 Oct 7;(4):CD006690. doi: 10.1002/14651858.CD006690.pub2
Reason for exclusion A three-arm study comparing the effects of Ketangling granules (sheng di 10g, shu di
15g, huang jing 10g, huang lian 5g, huang bai 6g, tian hua fen 10g, ze xie 15g, dan
shen 10g, chuan xiong 10g, zhi da huang 6g) plus diet & lifestyle modification (n = 32)
compared to diet & lifestyle alone (n = 14) and compared to no intervention (n = 16) in
people with impaired glucose tolerance. The discrepancy in sampling numbers
indicates that it is unlikely that the study was truly randomised.