1. Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
2. West Tallinn Central Hospital, Paldiski Mnt. 68, 10617 Tallinn, Estonia
3. The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
4. Pärnu College, University of Tartu, Ringi 35, 80012 Pärnu, Estonia