By Geissler B.   Neugebauer E.   Angster R.   Witte† J.   in Der Chirurg

ISSN:0009-4722|75|7|687-693

Springer Publishing Company ‎(2004)‎

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By Rollins-Smith L.A.   Needham D.A.P.   Davis A.T.   Blair P.J.   Ryan K.E.   Geissler B.   Knell S.   in Evaluation and Program Planning

ISSN:0149-7189|19|3|263-272

Elsevier‎(1996)‎

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