1 The Edison Family Center for Genome Sciences & Systems Biology, Department of Genetics, Washington University, 4515 McKinley Avenue, Campus Box 8510, St. Louis, MO, 63110, USA.
2 The Edison Family Center for Genome Sciences & Systems Biology, Department of Genetics, Washington University, 4515 McKinley Avenue, Campus Box 8510, St. Louis, MO, 63110, USA. twang@genetics.wustl.edu.
Following publication of the original paper [1], an error was reported in the processing of Fig. 2. The correct Fig. 2 is supplied below and the original article [1] has been corrected. The publishers apologize for the error.