[1] Univ Heidelberg Hosp, Thoraxklin, Heidelberg, Germany
[2] Schwarzwald Baar Klinikum, Klin Innere Med Onkol Hamatol Immunol Infektiol &, Villingen Schwenningen, Germany
[3] Asklepios Fachkliniken Gauting, Onkol Klin Pneumol, Gauting, Germany
[4] Evangel Lungenklin Berlin, Klin Pneumol, Berlin, Germany
[5] UKSH Lubeck, Med Klin 3, Lubeck, Germany
[6] St Vincentius Kliniken, Karlsruhe Abt Innere Med 2, Karlsruhe, Germany