Duff SB, Mordin MM. Strategies for assessing health economic and quality-of-life outcomes in multiple sclerosis. Expert Rev Pharmacoecon Outcomes Res. 2002 Dec;2(6):577-87.
Loughlin JE, Cole JA, Rothman KJ, Johnson ES. Prevalence of serious eosinophilia and incidence of Churg-Strauss syndrome in a cohort of asthma patients. Ann Allergy Asthma Immunol. 2002 Jan 1;88(3):319-25.