[1] Tulane Univ, Hlth Sci Ctr, Tulane Canc Ctr, New Orleans, LA 70112 USA
[2] Tulane Univ, Hlth Sci Ctr, Dept Environm Hlth Sci, New Orleans, LA 70112 USA
[3] Univ Michigan, Sch Med, Dept Human Genet, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Sch Med, Dept Internal Med, Ann Arbor, MI 48109 USA
[5] Louisiana State Univ, Dept Biol Sci, Biol Computat & Visualizat Ctr, Baton Rouge, LA 70803 USA
[6] Univ Penn, Sch Med, Dept Genet, Philadelphia, PA 19104 USA