D.M. West, Frances Smith, J. du Cailar, Howard L. Zauder1, James A. Bain2, W. E. Spoerel2, Richard G. McGown3, E. J. Ashworth4
1Department of Anesthesiology, USA
2Department of Anaesthesia, University of Western Ontario, London
3Salisbury, Rhodesia
4Dept. of Anaesthesia, Hamilton General Hospital, USA