1. Institute for Breath Research, Universität Innsbruck, Innrain 66, A-6020 Innsbruck, Austria
2. Department of Anaesthesiology and Critical Care, Medical University of Innsbruck, Anichstraße 35, A-6020 Innsbruck, Austria
3. Institute for Ion Physics and Applied Physics, Universität Innsbruck, Technikerstraße 25/3, A-6020 Innsbruck, Austria