Authors: Hapidou EG*, Mazzocato GL and Culig KM
Authors: Byhahn C*, Wilke HJ, Strouhal U, Kessler P, Lischke V and Westphal K
Authors: Fleischer BC, Pergolizzi JV*, Papagallo M, Tayor R and Jo Ann Lequang BA
Authors: Keppel Hesselink JM* and Kopsky DJ