Citation

No Author(s) Listed. Br. Med. J. BMJ 1964; 2(5419): 1255-1258.

Copyright

(Copyright © 1964, BMJ Publishing Group)

DOI

unavailable

PMID

unavailable

Abstract

unavailable]

Language: en

Available from PubMed Central:

http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid= 1817203