1. Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
2. Klinik für Pneumologie, Medizinische Hochschule Hannover, und Fraunhofer ITEM, DZL BREATH, Hannover, Deutschland
3. Dept. of Chemical & Environmental Engineering, Yale University, New Haven, CT, USA
4. Yale Tobacco Center of Regulatory Science, Dept. Of Psychiatry, Yale School of Medicine, New Haven, CT, USA