[1] St Marien Hosp, Lungenklin Koln Nord, Cologne, Germany
[2] Uniklin Koln, Inst Pathol, Cologne, Germany
[3] St Marien Hosp, Cologne, Germany
[4] Evangelisches Krankenhaus Kalk, Cologne, Germany
[5] St Marien Krankenhaus Koln, Lungenklin, St Marien Hosp, Cologne, Germany