^a Department of Clinical Chemistry and Medicity Research Laboratory, University of Turku, Turku, Finland

^b Department of Physiology, University of Turku, Turku, Finland

^c Department of Dermatology, University of Turku, Turku, Finland

^d Department of Medical Microbiology, University of Turku, Turku, Finland

^e MCA Laboratory, University of Turku, Turku, Finland

^f Department of Clinical Chemistry, University Hospital of Kuopio, Kuopio, Finland