1. ClearWay MinnesotaSM; Two Appletree Square 8011 34th Avenue South, Suite 400 Minneapolis, MN Minnesota USA 55425
2. HealthPartners; HealthPartners Research Foundation; PO Box 1524, Mail Stop: 21111R Minneapolis USA 55440
3. University of Wisconsin; Center for Tobacco Research and Intervention; 1930 Monroe, Suite 200 Madison WI USA 53711