Healthy volunteer effect in a lung cancer screening study

Health and Work Ability, Finnish Institute of Occupational Health, Helsinki, Finland Correspondence to Tapio Vehmas, MD, PhD, Health and Work Ability, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland Tel: +358 30 474 2481; fax: +358 30 474 2108; e-mail: [email protected] Received September 11, 2014 Accepted October 30,...