title: Two long-range clinical data bases are terminated: bang, whimper, or ripple?
mesh_terms: D049673:History, 20th Century; D006801:Humans; D007256:Information Systems / Q000266:history*; D008137:Longitudinal Studies; D009316:National Institutes of Health (U.S.); D009369:Neoplasms / Q000628:therapy; D011087:Polycythemia Vera / Q000266:history / Q000628:therapy; D014481:United States