00435pab a2200145 454500008004000000100001900040245009900059260000900158300001400167362000800181650002000189700001600209700001800225773004600243180718b2004   xxu||||| |||| 00| 0 eng d  aBuxton, Martin  aEstimating the economic value to societies of the impact of health research: a critical review  c2004  ap.733-37.  aOct  aHealth services  aJones, Teri  aHanney, Steve  aBulletin of the World Health Organization