aMehiläinen Airport Health Centre, Vantaa

bDepartment of Forensic Medicine, University of Helsinki, Helsinki, Finland

cFaculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa

dWihuri Research Institute, Atherosclerosis Research Laboratory, Helsinki, Finland

Correspondence to Alpo Vuorio, University of Helsinki and Mehiläinen Airport Health Centre, 01530 Vantaa, Finland. E-mail: [email protected]