Zvara D A, Mathes D D, Brooker R F, McKinley A C
Department of Anesthesia, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, North Carolina 27157-1009, USA.
Anesth Analg. 1996 May;82(5):1065-8. doi: 10.1097/00000539-199605000-00033.