MEDICAL SCIENCES, COMPUTER SCIENCES Correction for “Three differentiation states risk-stratify bladder cancer into distinct subtypes,” by Jens-Peter Volkmer, Debashis Sahoo, Robert K. Chin, Philip Levy Ho, Chad Tang, Antonina V. Kurtova, Stephen B. Willingham, Senthil K. Pazhanisamy, Humberto Contreras-Trujillo, Theresa A. Storm, Yair Lotan, Andrew H. Beck, Benjamin I. Chung, Ash A. Alizadeh, Guilherme Godoy, Seth P. Lerner, Matt van de Rijn, Linda D. Shortliffe, Irving L. Weissman, and Keith S. Chan, which appeared in issue 6, February 7, 2012, of Proc Natl Acad Sci USA (109:2078–2083; first published January 19, 2012; 10.1073/pnas.1120605109).
The authors note that Robert K. Chin should be listed as an additional corresponding author. The corrected correspondence footnote appears below. The online version has been corrected.
1To whom correspondence may be addressed. E-mail: jvolkmer@stanford.edu, sahoo@stanford.edu, rchin@radonc.uchicago.edu, irv@stanford.edu, or kc1@bcm.edu.