Reduced falls in the elderly: tai chi or placebo or Hawthorne effect?
Katz
Alan R
AR
D000058:Accidental Falls / Q000517:prevention & control* / Q000706:statistics & numerical data*; D000368:Aged; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D026302:Tai Ji / Q000379:methods*