1 School of Business and Economics, University of Jyvaskyla, Finland. Electronic address: jaakko.k.pehkonen@jyu.fi.
2 School of Business and Economics, University of Jyvaskyla, Finland.
3 Turku School of Economics and Labour Institute for Economic Research, Helsinki, Finland.
4 Department of Clinical Chemistry, Fimlab Laboratories and School of Medicine, University of Tampere, Finland.
5 Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland; Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital, Turku, Finland.