1. CFCs and inhalers;Woodcock;Lancet,1994
2. CFCs, their replacements, and the ozone-layer;Noakes;J Aerosol Med,1995
3. Montreal Protocol on substances that deplete the ozone layer, Final Act (Nairobi: UNEP, 1987). Federal Register 1994;59:56276–98.
4. Strategy for the phase out of CFCs in metered dose inhalers. Commission of the European Communities, 23.10.98, COM (1998) 603 Final.
5. Clinical efficacy and safety of fluticasone propionate 250μg twice daily administered via a HFA 134a pressurized metered dose inhaler to patients with mild to moderate asthma;Tonnel;Respir Med,2000