Donahue JG, Fuhlbrigge AL, Finkelstein JA, Fagan J, Livingston JM, Lozano P, Platt R, Weiss ST, Weiss KB. Asthma pharmacotherapy and utilization by children in 3 managed care organizations. The Pediatric Asthma Care Patient Outcomes Research Team. J Allergy Clin Immunol. 2000 Dec; 106(6):1108-14.