1. Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, U.S.A.
ychen123@upenn.edu jing14@upenn.edu
2. Department of Statistical Science, Cornell University, Comstock Hall 1188, Ithaca, New York 14853, U.S.A.
yn265@cornell.edu
3. Department of Life Sciences, National Yang-Ming University, Li-Nong Street, Taipei City 112, Taiwan
kyliang@nhri.org.tw