1 Department of Health Policy and Management, School of Public Health, Texas A&M University, 212 Adriance Lab Rd. 1266 TAMU, College Station, TX, USA. Electronic address: callaghan@tamu.edu.
2 Department of Health Policy and Management, Milken School of Public Health, George Washington University, 950 New Hampshire Avenue, Washington, DC, USA.
3 Department of Communication, Texas A&M University, 456 Ross St., College Station, TX, USA.
4 Texas Children's Center for Vaccine Development, Department of Pediatrics and Molecular Virology & Microbiology, National School of Tropical Medicine, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, USA.
5 Government Department, Wesleyan University, 238 Church St., Middletown, CT, USA.
6 Department of Political Science, Oklahoma State University, 210 Social Sciences and Humanities Hall, Stillwater, OK, USA.