1. Centre for the Prevention and Treatment of Tobacco Addiction (CPCT), Teaching Hospital “Policlinico - V. Emanuele”, University of Catania, Catania, Italy
2. Center of Excellence for the Acceleration of Harm Reduction (CoEHAR), University of Catania, Catania, Italy
3. Department of Medical Science, Surgical Science and Advanced Technologies “G.F, Ingrassia”, University of Catania, Catania, Italy
4. Department of Human Anatomy and Experimental Oncology, Faculty of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons (UMons), Mons, Belgium