Department of Medical Biochemistry, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. catherine.hayes@medkem.gu.se|Department of Medical Biochemistry, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. catherine.hayes@medkem.gu.se|Department of Medical Biochemistry, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. catherine.hayes@medkem.gu.se