1. Institute of Community Health, College of Pharmacy, University of Houston, Houston, Texas, USA
2. School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA
3. King Hussein Cancer Center, Cancer Control Office, Amman, Jordan
4. Institute of Community Health, College of Pharmacy, University of Houston, Houston, Texas, USA; School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA