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Assessing the potential for bias in direct observation of adult commuter cycling and helmet use
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Authors

  1. Correspondence to Professor John D Kraemer, Department of Health Systems Administration, Georgetown University, 3700 Reservoir Road, NW, 231 St Mary's Hall, Washington, DC 20007, USA; jdk32{at}georgetown.edu
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Citation

Kraemer JD, Zaccaro HN, Roffenbender JS, et al
Assessing the potential for bias in direct observation of adult commuter cycling and helmet use

Publication history

  • Received April 27, 2014
  • Revised June 5, 2014
  • Accepted July 1, 2014
  • First published July 18, 2014.
Online issue publication 
January 21, 2015

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