1. McDermott Center of Human Growth and Development; University of Texas Southwestern Medical Center; Dallas TX USA
2. Department of Clinical Sciences; University of Texas Southwestern Medical Center; Dallas TX USA
3. Department of Statistical Science; Southern Methodist University; Dallas TX USA
4. Department of Mathematical Sciences; DePaul University; Chicago IL USA
5. Gilead Sciences, Inc.; Seattle WA USA
6. Department of Bioinformatics; University of Texas Southwestern Medical Center; Dallas TX USA