1. Health Communication Research Laboratory, Division of Behavioral Science and Health Education, Department of Community Health, School of Public Health, Saint Louis University
2. Division of Biostatistics, Department ofCommunity Health, School of Public Health, Saint Louis University
3. Science Journalism Center, School of Journalism, University of Missouri-Columbia
4. Health Communication Research Laboratory, Division of Behavioral Science and Health Education, Department of Community Health, School of Public Health, Saint Louis University.