1. Heart Center Co., Tampere University Hospital, Tampere, Finland.
2. Department of Internal Medicine, Tampere University Hospital, Tampere, Finland.
3. Faculty of Medicine and Life Sciences, Tampere University Hospital, Tampere, Finland.
4. Faculty of Social Sciences, Tampere University Hospital, Tampere, Finland.
5. Division of Endocrinology, Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland.
6. Division of Internal Medicine, Seinäjoki Central Hospital, Seinäjoki, Finland.