Author Contributions: Ms Kozhimannil and Dr Harlow had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Kozhimannil, Pereira, Harlow.
Acquisition of data: Kozhimannil.
Analysis and interpretation of data: Kozhimannil, Pereira, Harlow.
Drafting of the manuscript: Kozhimannil, Pereira, Harlow.
Critical revision of the manuscript for important intellectual content: Pereira, Harlow.
Statistical analysis: Kozhimannil, Pereira.
Study supervision: Harlow.
Financial Disclosures: None reported.
Funding/Support: This study was supported by the Fellowship in Pharmaceutical Policy Research at the Department of Ambulatory Care and Prevention, Harvard Medical School; a Harvard University Dissertation Completion Grant; the Harvard University PhD Program in Health Policy; and the Harvard Pilgrim Health Care Foundation.
Role of the Sponsor:The Fellowship in Pharmaceutical Policy Research financed data acquisition for this study and provided research mentorship to Ms Kozhimannil. New Jersey's Medicaid program had no role in the design or conduct of the study; the collection, management, analysis, or interpretation of the data; or the preparation, review, or approval of the manuscript.
Additional Contributions: This study benefited greatly from input and advice provided by Alyce Adams, PhD, Alisa Busch, MD, MS, Haiden Huskamp, PhD, and Stephen Soumerai, ScD, and also from data management support provided by Amy Johnson Graves, MPH, and Fang Zhang, PhD. We also gratefully acknowledge the assistance of Dominic Magnolo (public records custodian) in facilitating access to New Jersey's Medicaid administrative claims databases. None of the named individuals received any compensation for their contributions.