aLondon School of Hygiene and Tropical Medicine, Faculty of Infectious and Tropical Diseases, London, UK

bInstituto Conmemorativo Gorgas de Estudios de la Salud

cNational Research System, National Secretariat of Science, Technology and Innovation, Panama City, Panama

dCenter of Population Sciences for Health Equity, College of Nursing, Florida State University, Tallahassee, Florida

eUniversity of North Carolina Greensboro, School of Health and Human Sciences, Greensboro, North Carolina, USA

Correspondence to Amanda Gabster, Av. Justo Arosemena y Calle 36, Panama City 00000, Panama. Tel: +507 527 4952; e-mail: [email protected]