סקירת המאמר: Lancet. 2004 Jan 24;363(9405):271-5.  Doubling the dose of inhaled corticosteroid to prevent asthma exacerbations: randomised controlled trial. Harrison TW, Oborne J, Newton S,

סקירת מאמר Ann Intern Med. 2004 May 18;140(10):802-13. Meta-analysis: respiratory tolerance to regular beta2-agonist use in patients with asthma. Salpeter SR, Ormiston TM, Salpeter EE.