1. From the Institute for Clinical & Experimental Surgery (M.R., T.S., C.S., Y.H., M.M.), University of Saarland, Homburg/Saar; the Department of Oral and Maxillofacial Surgery (M.R.), Hannover Medical School, Hannover; and the Department of Experimental Surgery (B.V.), University of Rostock, Rostock, Germany.