[1] Univ Innsbruck, A-6020 Innsbruck, Austria
[2] Sleep Res Inst, Madrid, Spain
[3] Hosp San Raffaele, I-20132 Milan, Italy
[4] Univ Hosp, Larisa, Greece
[5] Univ Freiburg, Freiburg, Germany
[6] Univ Hosp, Zwolle, Netherlands
[7] Univ Marburg, Marburg, Germany
[8] Univ Hosp, Gottingen, Germany
[9] Johns Hopkins Univ, Baltimore, MD USA
[10] IMEREM, Nurnberg, Germany