Johannes CB, Le TK, Zhou X, Johnston JA, Dworkin RH. The prevalence of chronic pain in United States adults: results of an internet-based survey. J Pain. 2010 Nov 1;11(11):1230-9.
Williams LK, Peterson EL, Wells K, Campbell J, Wang M, Chowdhry VK, Walsh M, Enberg R, Lanfear DE, Pladevall-Vila M. A cluster-randomized trial to provide clinicians inhaled corticosteroid adherence information for their patients with asthma. J Allergy Clin Immunol Pract. 2010 Aug;126(2):225-31.
Hirst C, Castellsague J, Calingaert B, Stanford RH. Asthma exacerbations associated with inhaled corticosteroid/long-acting beta-agonists or other inhaled corticosteroid regimens in pediatrics: meta-analysis of observational studies. J Allergy Clin Immunol Pract. 2010 Feb 1;125(2):AB71.