1. School of Statistics and Management Shanghai University of Finance and Economics Shanghai China
2. Shanghai Institute of International Finance and Economics Shanghai University of Finance and Economics Shanghai China
3. Department of Statistics The Chinese University of Hong Kong Shatin Hong Kong
4. Department of Radiology and Biomedical Research Imaging Center (BRIC) University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
5. Department of Biostatistics University of North Carolina at Chapel Hill Chapel Hill North Carolina USA