3Felson DT, Zhang Y. An update,on the epidemiology of knee andhip osteoarthritis with a view toprevention [ J ]. Arthritis Rheum,1998,41(8) :1343 -1355.
4Kwon YD, Pittler MH,Ernst E.Acupuncture for peripheral jointosteoarthritis : a systematic reviewand meta - analysis [ J]. Rheuma-tology (Oxford),2006, 45 ( 11 ):1331 -1337.
5Wu T,Ii Y,Bian Z,et al. Ran-domized trials published in someChinese journals: how many arerandomized[ J] . Trials,2009,10:46.
