Federico MJ, Covar RA, Brown EE, Leung DY, Spahn JD. Racial differences in T-lymphocyte response to glucocorticoids. Chest. 2005 Feb;127(2):571-8.
Paull K, Covar RA, Jain N, Gelfand EW, Spahn JDDo NHLBI lung function criteria apply to children? A cross-sectional evaluation of childhood asthma at National Jewish Medical and Research Center, 1999-2002. Pediatr Pulmonol 2005 Feb.
Group. Progression of asthma measured by lung function in the Childhood Asthma Management Program. Am J Respir Crit Care Med. 2004;170(3):234-41.
Covar RA, Spahn J, Murphy JR, Martin RJ, Silkoff P, Sundstrom DA, Szefler SJ. Safety and application of induced sputum analysis in childhood asthma. J Allergy Clin Immunol. 2004;114(3):575-82.
Covar RA, Spahn JD. Treating the wheezing infant. Pediatr Clin North Am 2003, 50:631-654.