1. Telemark Hospital, Skien, Norway (I.G., L.C.R., A.L., C.G., E.C., G.H.)
2. Stavanger University Hospital, Stavanger, Norway (L.J., J.K.N.)
3. Stavanger University Hospital, Stavanger, Norway, and University of Bergen, Bergen, Norway (T.H.L., R.O., H.S.)
4. University of Stavanger and Stavanger University Hospital, Stavanger, Norway (J.T.K.)
5. Telemark Hospital, Skien, Norway, Vestfold Hospital, Tønsberg, Norway, and University of Oslo, Oslo, Norway (T.B.)