A preliminary research note: on-line information systems: their potential value to the practicing physician.
D003365:Costs and Cost Analysis; D004345:Drug Industry; D004346:Drug Information Services / Q000706:statistics & numerical data*; D004502:Education, Medical, Continuing; D004513:Education, Pharmacy, Continuing; D007255:Information Services / Q000706:statistics & numerical data*; D008523:MEDLARS / Q000706:statistics & numerical data*; D010595:Pharmacists; D013689:Telephone; D014481:United States