[1] Univ Turku, Dept Pulm Dis & Clin Allergol, Sleep Res Ctr, Turku, Finland
[2] Univ Turku, Turku Univ Hosp, Heart Ctr, Turku, Finland
[3] Univ Turku, Dept Anesthesiol & Intens Care, POB 51,Kiinamyllynkatu 4-8, FI-20521 Turku, Finland
[4] Turku Univ Hosp, Div Perioperat Serv, Intens Care & Pain Med, Turku, Finland
[5] Helsinki Univ Hosp, Dept Obstet & Gynecol, Helsinki, Finland
[6] Univ Turku, Dept Future Technol, Turku, Finland
[7] Turku Univ Hosp, Dept Obstet & Gynecol, Turku, Finland
[8] Univ Turku, Turku, Finland
[9] Bragee ME CFS Ctr, Stockholm, Sweden
[10] Univ Turku, Paavo Nurmi Ctr, Turku, Finland
[11] Univ Turku, Unit Hlth Phys Activ, Turku, Finland
[12] Turku Univ Hosp, Dept Pulm Dis, Med, Turku, Finland