1. Department of Psychology, University of Wisconsin—Stevens Point, Stevens Point, WI, USA
2. University of Minnesota Masonic Cancer Center Biostatistics Core, Minneapolis, MN, USA
3. Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA
4. University of Minnesota, Tobacco Research Programs, Minneapolis, MN, USA
5. Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA