Affiliation: | (1) Dept. I of Internal Medicine, University Hospital Cologne, Joseph-Stelzmann-Strasse 9, D-50924 Cologne, Germany e-mail: a.schulz@uni-koeln.de, Tel.: 0049-0221-478-4403/6206, Fax: 0049-0221-478-5134, DE;(2) Dept. III of Internal Medicine, University Hospital Cologne, Germany, DE |