1 Department of Cardiology, Onassis Cardiac Surgery Center, Kallithea, Greece; kfarsalinos@gmail.com.
2 Department of Cardiology, Onassis Cardiac Surgery Center, Kallithea, Greece;
3 Public Health and Tobacco Dependence, Amzer Glas, Rennes, France; UK Centre for Tobacco Control Studies, University of Nottingham, Nottingham, England.