Patterns of Use and Withdrawal Syndrome in Dual Cannabis and Tobacco Users (DuCATA_GAM-CAT): Protocol for a Mixed Methods Study

Judith Saura   ^{1, 2, 3, 4} , BSc, MSc ;   Ariadna Feliu   ^{1, 2, 3} , BSc, BA, MPH, PhD ;   Marta Enríquez-Mestre   ^{1, 2} , RN ;   Marcela Fu   ^{1, 2, 3, 5} , BSc, PhD ;   Montse Ballbè   ^{1, 2, 3, 6} , BSc, MPH, PhD ;   Yolanda Castellano   ^{1, 2, 3} , MPH ;   Margarida Pla   ^{4, 5} , BSc, PhD ;   Nathalia Rosa   ^{7, 8} , BSc, MPH, PhD ;   Petia Radeva   ⁹ , BSc, MSc, PhD ;   Elena Maestre-González   ¹⁰ , BSc, MSc ;   Carmen Cabezas   ¹¹ , MPH, MD, PhD ;   Joan Colom   ¹² , BSc, MPH ;   Josep M Suelves   ^{12, 13} , BSc, MPH, PhD ;   Silvia Mondon   ¹⁴ , BSc, MPH, PhD ;   Pablo Barrio   ¹⁴ , MD, PhD ;   Magalí Andreu   ¹⁴ , BSc, MPH, PhD ;   Antònia Raich   ¹⁵ , BSc, MSC ;   Jordi Bernabeu   ¹⁵ , BSc, MSc ;   Jordi Vilaplana   ¹⁶ , BSc, MSc, PhD ;   Xavier Roca Tutusaus   ^{17, 18} , BSc, MPH, PhD ;   Joseph Guydish   ¹⁹ , PhD ;   Esteve Fernández   ^{1, 2, 3, 4} , MPH, MD, PhD ;   Cristina Martínez   ^{1, 2, 3, 5, 19} , RN, BA, PhD

¹ Tobacco Control Unit, Cancer Control and Prevention Program, Institut Català d’Oncologia, WHO Collaborating Center On Tobacco Control, Barcelona, Spain

² Cancer Control and Prevention Group, Institut d’Investigació Biomèdica de Bellvitge-IDIBELL, l’Hospitalet de Llobregat, Spain

³ CIBER en Enfermedades Respiratorias, CIBERES, Instituto Salud Carlos III, Madrid, Spain

⁴ Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain

⁵ Department of Public Health, Mental Health, and Maternal and Child Health Nursing, School of Nursing - Bellvitge Campus, Universitat de Barcelona, Barcelona, Spain

⁶ Addictions Unit, Institute of Neurosciences, Hospital Clínic de Barcelona, Barcelona, Spain

⁷ Campus Docent San Joan de Deu, Sant Boi de Llobregat, Spain

⁸ Department of Medicine and Life Sciences, Pompeu Fabra University (UPF), Barcelona, Spain

⁹ Department of Mathematics and Computer Science, University of Barcelona, Barcelona, Spain

¹⁰ School of Nursing, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain

¹¹ Government of Catalonia, Public Health Secretariat, Barcelona, Spain

¹² Public Health Agency of Catalonia, Barcelona, Spain

¹³ Universitat Oberta de Catalunya, Barcelona, Spain

¹⁴ Addictions Unit, Psychiatry Department, Institute of Neurosciences, Hospital Clínic de Barcelona, Barcelona, Spain

¹⁵ Mental Health Department, Althaia Xarxa Assistencial Universitària, Manresa, Spain

¹⁶ Serra Húnter Fellow, Computer Science Department, Universitat de Lleida, Lleida, Spain

¹⁷ Addictive Behaviors Unit, Psychiatry Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain

¹⁸ Institut d'Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain

¹⁹ Philip R. Lee Institute for Health Policy Studies, University of California San Francisco, San Francisco, CA, United States