1. Topical treatments for seasonal allergic conjunctivitis: systematic review and meta-analysis of efficacy and effectiveness by Christopher G Owen, Anupa Shah, Katherine Henshaw, Liam Smeeth, and Aziz Sheikh BJGP Volume 54(503):451-456 June 1, 2004 ©2004 by British Journal of General Practice

2. Odds ratio and 95% CI of perceived benefit of using sodium cromoglycate compared with placebo. Christopher G Owen et al. Br J Gen Pract 2004;54:451-456 ©2004 by British Journal of General Practice

3. Odds ratio and 95% CI of perceived benefit of using nedocromil sodium compared with placebo. Christopher G Owen et al. Br J Gen Pract 2004;54:451-456 ©2004 by British Journal of General Practice

4. Odds ratio and 95% CI of perceived good or excellent treatment efficacy with topical mast cell stabilisers versus antihistimines. Christopher G Owen et al. Br J Gen Pract 2004;54:451-456 ©2004 by British Journal of General Practice