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Letter
Healthy worker effects explain differences in internal and external comparisons in a rubber industry cohort study

Authors

  1. Correspondence to Dr Frank de Vocht, Population Health Sciences, University of Bristol, Bristol, UK; frank.devocht{at}bristol.ac.uk
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Citation

Hidajat M, McElvenny DM, Ritchie P, et al
Healthy worker effects explain differences in internal and external comparisons in a rubber industry cohort study
Occupational and Environmental Medicine 2019;76:781.

Publication history

  • Received July 14, 2019
  • Accepted August 20, 2019
  • First published September 12, 2019.
Online issue publication 
September 13, 2019

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© Author(s) (or their employer(s)) 2019. No commercial re-use. See rights and permissions. Published by BMJ.