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3. The sight test fee. Little evidence to support conclusions. Kirkby GR. BMJ; 1994 Nov 19; 309(6965):1370; author reply 1372. PubMed ID: 7866093 [No Abstract] [Full Text] [Related]
8. The sight test fee. 1988 data may be misleading. Pooley J, Woodward EG, Cooling R. BMJ; 1994 Nov 19; 309(6965):1370; author reply 1372. PubMed ID: 7866096 [No Abstract] [Full Text] [Related]