LarsenJSHahnMKochevarJWMorrisRJKaiserHBWeisbergSC. Administration errors with a conventional metered dose inhaler versus a novel breath activated device. Ann Allergy1993; 71: 103–6.
2.
National Center for Health Statistics. Vital and health statistics: Current estimates from the national health interview survey, 1991 (CDC), December 1992; DHHS No. 93–1512:95–9.
3.
Data on file at 3M Pharmaceuticals (obtained by the Gallup Organization). Traditional metered-dose inhalers market assessment. 3M Pharmaceuticals, Northridge, CA, 1991.
