1. University Medical Center Hamburg-Eppendorf, Hamburg, Germany (D.W., J.S., M.L., S.S., C.E., A.H., F.H., H.M., I.K., A.S.S., C.B., G.D., A.N., D.F., S.P., S.S., C.B., M.M.A., M.A., K.P., S.K.)
2. Asklepios Hospital Barmbek, Hamburg, Germany (H.B., A.S.)
3. Bethesda Hospital Bergedorf, Hamburg, Germany (H.B.)
4. Agaplesion Diakonie Hospital, Hamburg, Germany (A.D.)
5. Amalie Sieveking Hospital, Hamburg, Germany (H.P.)
6. Asklepios Hospital Saint Georg, Hamburg, Germany (S.S.)