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Biases in the observational study of β blockers in COPD
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  1. Dr S Suissa, Center for Clinical Epidemiology, Jewish General Hospital, 3755 Côte-Sainte-Catherine Road, Montréal, Québec, Canada H3T 1E2; samy.suissa{at}mcgill.ca
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Suissa S, Ernst P
Biases in the observational study of β blockers in COPD

Publication history

  • Accepted June 29, 2008
  • First published November 4, 2008.
Online issue publication 
November 04, 2008

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