Understanding Public Perceptions and Discussions on Opioids Through Twitter: Cross-Sectional Infodemiology Study

Federico Carabot   ^{1, 2} , MD ;   Oscar Fraile-Martínez   ^{2, 3} , MSc ;   Carolina Donat-Vargas   ^{4, 5, 6} , PhD ;   Javier Santoma   ^{3, 7} , MSc ;   Cielo Garcia-Montero   ^{2, 3} , MSc ;   Mariana Pinto da Costa   ^{8, 9} , MD, PhD ;   Rosa M Molina-Ruiz   ¹⁰ , MD, PhD ;   Miguel A Ortega   ^{1, 2} , MD, PhD ;   Melchor Alvarez-Mon   ^{2, 3, 11} , MD, PhD ;   Miguel Angel Alvarez-Mon   ^{1, 2, 12} , MD, PhD

¹ Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain

² Ramón y Cajal Institute of Sanitary Research, Madrid, Spain

³ Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Madrid, Spain

⁴ Institute for Global Health, Barcelona, Spain

⁵ Centro de Investigación Biomédica en Red | Epidemiología y Salud Pública (CIBER) Epidemiología y Salud Pública, Madrid, Spain

⁶ Cardiovascular and Nutritional Epidemiology, Unit of Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden

⁷ Filament Consultancy Group, London, United Kingdom

⁸ South London and Maudsley NHS Foundation Trust, London, United Kingdom

⁹ Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom

¹⁰ Department of Psychiatry and Mental Health, San Carlos Clinical University Hospital, IdiSSC, Madrid, Spain

¹¹ Immune System Diseases-Rheumatology and Internal Medicine Service, University Hospital Príncipe de Asturias, Centro de Investigación Biomédica en Red | Enfermedades Hepáticas y Digestivas (CIBEREHD), Alcalá de Henares, Spain

¹² Department of Psychiatry and Mental Health, Hospital Universitario Infanta Leonor, Madrid, Spain