Key points are not available for this paper at this time.
Physiologisches Institut, Christian-Albrechts-Universität, KielF.R.G. ∗Correspondence to: Prof. Dr. Wilfrid Jänig, Physiologisches Institut, Christian-Albrechts-Universität, Ohlshausenstrasse 40, 2300 Kiel, F.R.G. Submitted January 15, 1991; accepted February 7, 1991.
Wilfrid Jänig (Sun,) studied this question.