1. University of Texas Health Science Center, School of Nursing, Center for Nursing Research, Houston, TX, USA
2. University of Texas Health Science, Center School of Public Health, Houston, TX, USA
3. Department of Community Health Systems, University of California, San Francisco School of Nursing, San Francisco, CA, USA
4. Rice University Houston, TX, USA
5. The University of Oklahoma Health Sciences Center, Oklahoma Tobacco Research Center, Oklahoma City, OK, USA