1 Smoking Cessation and Addictive Disorders Unit, Department of Clinical Psychology and Psychobiology, Faculty of Psychology, University of Santiago de Compostela, Santiago de Compostela, Spain. carmela.martinez@usc.es.
2 Tobacco Research and Intervention Program, Department of Health Outcomes and Behaviour, H. Lee Moffitt Cancer Center, Tampa, FL, USA.
3 Smoking Cessation and Addictive Disorders Unit, Department of Clinical Psychology and Psychobiology, Faculty of Psychology, University of Santiago de Compostela, Santiago de Compostela, Spain.
4 Department of Psychology and Sociology, University of Zaragoza, Zaragoza, Spain.