1. Institute for Blood Purification, Frankenstraße 4, 66424 Homburg, Germany
2. Inselklinik Heringsdorf GmbH, 17424 Seeheilbad Heringsdorf, Germany
3. Main Hospital Darmstadt, 64283 Darmstadt, Germany
4. Laboratorium of Medicine, 66386 St Ingbert, Germany