[1] Univ Washington, Seattle, WA USA
[2] Wake Forest Univ, Sch Med, Winston Salem, NC USA
[3] Ctr Dis Control & Prevent, Atlanta, GA USA
[4] Univ Colorado Denver, Aurora, CO USA
[5] Univ N Carolina, Chapel Hill, NC USA
[6] Univ Cincinnati, Coll Med, Cincinnati, OH USA
[7] Univ South Carolina, Columbia, SC USA
[8] Kaiser Permanente Southern Calif, Pasadena, CA USA
[9] Medpace Reference Labs, Cincinnati, OH USA