1. GSF - National Research Center for Environment and Health, Institute of Inhalation Biology, Neuherberg/Munich, Germany
2. Inamed Research GmbH & Co. KG, Gauting, Germany
3. Department of Environmental Medicine, University of Rochester, Rochester, New York, USA
4. GSF - National Research Center for Environment and Health, Institute of Inhalation Biology and Focus Network Aerosols and Health, Neuherberg/Munich, Germany