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Travel and Venous Thrombosis: An Exercise in Thinking About Bias
Jan P. Vandenbroucke, MD, PhD; Suzanne C. Cannegieter, MD, PhD; Frits R. Rosendaal, MD, PhD
Annals of Internal Medicine 2009;151:212-213.
doi:10.7326/0003-4819-151-3-200908040-00130
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