Br Med J (Clin Res Ed). 1982 Sep 11;285(6343):738. doi: 10.1136/bmj.285.6343.738.
British medical journal (Clinical research ed.)
J Trowell
PMID: 6809218 PMCID: PMC1499867 DOI: 10.1136/bmj.285.6343.738
[No abstract available.]