1. Oxford Lasers, 60/62 Magdalen Road, Oxford OX4 1RD (Tel. 0865 251 479)
2. Mckenzie AL, Carruth JAS. A comparison of gold vapour and dye lasers for photodynamic therapy.Lasers Med Sci 1986,1:117–20
3. Able Instruments and Controls, Cutbush Park, Danehill, Lower Earley, Reading, Berkshire RG6 4UT. (Tel. 0734 311188)
4. Laserguide Inc. (Phototherapeutics Inc.), 94 Commerce Drive, Suite H, P.O. Box 930, Buellton, California 93427, USA
5. Department of Health and Social Security.Guidance on the Safe Use of Lasers in Medical Practice DHSS, 14 Russell Square, London WC1B 5EP