[1] Stanford Univ, Sch Med, Stanford, CA USA
[2] Thomas Jefferson Univ, Sidney Kimmel Sch Med, Philadelphia, PA USA
[3] Univ Calif Los Angeles, Dept Med, Los Angeles, CA USA
[4] RAND Corp, Santa Monica, CA USA
[5] Verana Hlth, San Francisco, CA USA
[6] US FDA, Ctr Devices & Radiol Hlth, Silver Spring, MD USA