Br J Ophthalmol. 1972 Jul;56(7):555-8. doi: 10.1136/bjo.56.7.555.
The British journal of ophthalmology
R Porter
PMID: 4341830 PMCID: PMC1208840 DOI: 10.1136/bjo.56.7.555 Free PMC Article
[No abstract available.]