1. Pulmonary Division; Department of Internal Medicine; Cantonal Hospital Winterthur; Winterthur; Switzerland
2. Pulmonary Division; Department of Internal Medicine; Cantonal Hospital St. Gallen; St. Gallen; Switzerland
3. Department of Ophthalmology; University Hospital; Zurich; Switzerland
4. Department of Intensive Care Medicine; University Hospital Berne; Berne; Switzerland
5. Department of Surgery; Cantonal Hospital Aarau; Aarau; Switzerland
6. Institute of Laboratory Medicine; Cantonal Hospital Aarau; Aarau; Switzerland