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History
- May 7, 2016.
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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
Author Information
- Correspondence author: Wei Pan, Telephone: (612) 626-2705, Fax: (612) 626-0660, Email: weip{at}biostat.umn.edu, Address: Division of Biostatistics, MMC 303, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455–0392, U.S.A.