Development and Validation of a Medication Intensity Scale Derived From Computerized Pharmacy Data That Predicts Emergency Hospital Utilization for Persistent AsthmaByMichael Schatz, MD,Robert S. Zeiger, MD, PhD,William M. Vollmer, PhD,David Mosen, PhD,Andrea J. Apter, MD,Thomas B. Stibolt, MD,Albin Leong, MD,Michael S. Johnson, MS,Guillermo Mendoza, MD,E. Francis Cook, ScDAugust 1st 2006