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Authors: Cai, Jianwen; Zeng, Donglin
Source: Biometrics, Volume 67, Number 4, 1 December 2011, pp. 1340-1351(12)
Document Type: Research Article
Affiliations: Department of Biostatistics, University of North Carolina at Chapel Hill, North Carolina 27599-7420, U.S.A.
Publication date: December 1, 2011