1. How patients determine when to replace their metered-dose inhalers;Ogren;Ann Allergy Asthma Immunol,1995
2. Drug delivery characteristics of metered-dose inhalers;Schultz;J Allergy Clin Immunol,1995
3. Assessing fullness of asthma patients' aerosol inhalers;Rickenbach;Br J Gen Pract,1994
4. How do patients determine that their metered-dose inhaler is empty?;Rubin;Chest,2004
5. When should your asthma patients refill their MDI propelled with chlorofluorocarbons?;Weinstein;Del Med J,1998