Source:
British medical journal [Br Med J] 1961 Jul 22; Vol. 2 (5246), pp. 227-8.Publisher: British Medical Association Country of Publication: England NLM ID: 0372673 Publication Model: Print Cited Medium: Print ISSN:
Source:
British medical journal [Br Med J] 1961 Oct 07; Vol. 2 (5257), pp. 924-9.Publisher: British Medical Association Country of Publication: England NLM ID: 0372673 Publication Model: Print Cited Medium: Print ISSN: