Frequent changes in policy risk confusion among health workers

BMJ 1999; 319 doi: https://doi.org/10.1136/bmj.319.7201.58a (Published 03 July 1999) Cite this as: BMJ 1999;319:58
  1. P Brettle, Medical student,
  2. L Guinness, Medical student,
  3. L Lim, Medical student (Elizabeth.lim@ncl.ac.uk),
  4. S Robb, Medical student
  1. Department of Epidemiology and Public Health, University of Newcastle upon Tyne, Newcastle upon Tyne NE2 4HH

    EDITOR—The study by Usen et al1 adds weight to their previous work,2 with a larger sample and better blinding of investigators considering a wide range of clinical …

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