1 Nga TQ. Nguyen is with the Department of Pharmaceutical Administration, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam. Hoa Q. Nguyen is with the Department of Clinical Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam and the School of Pharmacy, Queen's University, Belfast, UK. Ciaran O'Neill is with the Centre for Public Health, Queen's University, Belfast, UK.