adult human 5 Adult 4 Female 4 Humans 4 Male 4 female 4 male 4 contingent valuation 3 controlled study 3 major clinical study 3 questionnaire 3 Article 2 Surveys and Questionnaires 2 Willingness To Pay 2 article 2 decision making 2 economics 2 income 2 mortality 2 procedures 2 social status 2 vaccination 2 Adolescent 1 Bangladesh 1 Brain 1 COVID-19 Vaccines 1 Child 1 Choice prediction 1 Cost-Benefit Analysis 1