1. Graduate Programs in Public Health, University of New England, Portland, ME, USA
2. Department of Management, Policy and Community Health, The University of Texas Health Science Center at Houston School of Public Health, Houston, TX, USA
3. Department of Biostatistics, The University of Texas Health Science Center at Houston School of Public Health, Houston, TX, USA
4. Department of Pediatrics, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, USA