Chapters by Dr. William Clarke

• Book Chapter Diagnostic Accuracy and Interpretation of Urine Drug Testing for Pain Patients: An Evidence-Based Approach
  by Amadeo Pesce, Cameron West, Kathy Egan-City and William Clarke in the book "Toxicity and Drug Testing" edited by William Acree, ISBN 978-953-51-0004-1, InTech, February 2, 2012