1. Royal College of Anaesthetists and Royal College of Ophthalmologists. Report of the Joint Working Party on Anaesthesia in Ophthalmic Surgery, March 1993.
2. Walker D, Williams P, Tawn J . Audit of requests for pre-operative chest radiography. BMJ 1994;309:772–3.
3. Corbett MC, Shilling JS, Holder GE . The assessment of clinical investigations: the Greenwich grading system and its application to electrodiagnostic testing in ophthalmology. Eye 1995;9(Suppl):59–64.
4. Dripps RD, Lamont A, Eckenhoff JE . The role of anesthesia in surgical mortality. JAMA 1961;178:261.
5. Barnard NA, Williams RW, Spencer EM . Pre-operative patient assessment: a review of the literature and recommendations. Ann R Coll Surg Engl 1994;76:293–7.