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A different kind of contextual effect: geographical clustering of cocaine incidence in the USA
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  1. Correspondence to:
 Kenneth R Petronis, Substance Abuse and Mental Health Services Administration, Office of Applied Studies, 5600 Fishers Lane, 16-105, Rockville, MD 20857, USA; 
 kpetronisamhsa.gov
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Petronis KR, Anthony JC
A different kind of contextual effect: geographical clustering of cocaine incidence in the USA

Publication history

  • Accepted March 30, 2003
  • First published November 4, 2003.
Online issue publication 
November 04, 2003

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