Biochemical verification of tobacco use and cessation.

Peyton Jacob III, University of California, San Francisco; Karen Ahijevych, Ohio State University; Martin J. Jarvis, University College London; Sharon Hall, University of California, San Francisco; Jacques LeHouezec, Pharmacia Consumer Health Care; Anna Hansson, Pharmacia Consumer Health Care; Ed Lichtenstein, Oregon Research Institute; Jack Henningfield, Johns Hopkins University School of Medicine and Pinney Associates; Janice Tsoh, University of California, San Francisco; Richard D. Hurt, Mayo Medical School; Wayne Velicer, University of Rhode Island. Correspondence: Neal L. Benowitz, MD, Chief, Division of Clinical Pharmacology and Experimental Therapeutics, University of California, San Francisco, Box 1220, San Francisco, CA 94143-1220 , USA. Tel.: +1 (415)-206-8324; Fax: +1 (415)-206-4956; E-mail: [email protected] Biochemical verification of tobacco use and cessation