The school inner-city asthma study: design, methods, and lessons learned.
Phipatanakul W, Bailey A, Hoffman EB, Sheehan WJ, Lane JP, Baxi S, Rao D, Permaul P, Gaffin JM, Rogers CA, Muilenberg ML, Gold DR. The school inner-city asthma study: design, methods, and lessons learned. J Asthma. 2011 Dec; 48(10):1007-14.