1 Division of Biostatistics and Bioinformatics, Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, 550 North Broadway, Baltimore, Maryland 21205, USA.
2 Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA.
3 Department of Mathematics, Duke University, Durham, North Carolina 27708, USA.
4 Department of Statistics, Rice University, Houston, Texas 77005, USA.
5 Laboratoire de Probabilités &Modéles Aléatoires, UMPC Université Paris 06, 75252 Paris, France.
6 Department of Biostatistics, Harvard T.H. Chan School of Public Health &Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.
7 Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York 10017, USA.
8 Ludwig Center &Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, 1650 Orleans Street St, Baltimore, Maryland 21205, USA.