Br Med J. 1937 Mar 13;1(3975):550-2. doi: 10.1136/bmj.1.3975.550.
British medical journal
S W Williams, R M Panting
PMID: 20780531 PMCID: PMC2088402 DOI: 10.1136/bmj.1.3975.550
[No abstract available.]