Bibliographical noteFunding Information:
Received for publication 3 July 1985, and in revised form 15 October 1985. This work was presented in part at the 25th Interscience Conference on Antimicrobial Agents and Chemotherapy, Minneapolis, Minnesota, on 1 October 1985. This work was supported by grant AM-13083 from the National Institute of Arthritis, Metabolism, and Digestive Diseases and by grants from Burroughs Wellcome Co. USA, and the Minnesota Medical Foundation. Please address requests for reprints to Dr. Henry H. Balfour, Box 437 Mayo Memorial Building, University of Minnesota Health Sciences Center, Minneapolis, Minnesota 55455. * Nancy L. Cole's present address is the South Bend Center for Medical Education, Notre Dame, Indiana 46556.