Concordance of survey and billing data in a study of outpatient healthcare cost and utilization among epilepsy patients
University of Texas Health Science Center at Houston, School of Public Health, Center for Health Services Research, 1200 Herman Pressler, RAS E-307, Houston, TX 77030, United States
Received 17 February 2009; received in revised form 22 July 2009; accepted 24 July 2009.
PII: S0920-1211(09)00201-0
doi:10.1016/j.eplepsyres.2009.07.010
© 2009 Elsevier B.V. All rights reserved.
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