Key points are not available for this paper at this time.
Department of Neurology, University of California, San Francisco, San Francisco, CA, United States Address: 755 Euclid Ave, Berkeley, CA 94708, United States. Tel.: 510 919 2886. E-mail address: email protected (H.L. Fields). Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.
Howard L. Fields (Thu,) studied this question.