A business brief notes that Dr. Robert M. Mentzer, Jr., dean of Wayne State University\'s School of Medicine, sent an e-mail Friday accusing the Detroit Medical Center of not negotiating their contract in good faith. Mentzer wrote that the DMC is attempting to eliminate joint sponsorship of the (doctor joint residency) programs and trying to intimidate the school\'s department chairs into supporting such efforts. He said the DMC\'s action is \"inconsistent with good faith negotiations and places our jointly sponsored programs at great peril.\" In response to the e-mail, the DMC said it continues to negotiate in good faith and honor mediation guidelines.