1. Center for Lung Biology, University of Washington, Seattle, Washington
2. Department of Biochemistry, Faculty of Medicine, Universities of Giessen and Marburg Lung Center, Giessen, Germany
3. Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Frankfurt am Main, Germany
4. National Institute for Chemical-Pharmaceutical Research and Development, Bucharest, Romania