1. University of Iowa Carver College of Medicine; University of Iowa College of Public Health; and Holden Comprehensive Cancer Center, University of Iowa, Iowa City, Iowa (B.T.L.)
2. University of Iowa Carver College of Medicine, Iowa City, Iowa (Y.X., J.M.D.)
3. University of Iowa Carver College of Medicine, and Holden Comprehensive Cancer Center, University of Iowa, Iowa City, Iowa (R.M.H.)
4. University of Iowa College of Public Health, Iowa City, Iowa (J.D.D.)
5. Dell Medical School, University of Texas at Austin, Austin, Texas, and Texas Tech University Health Sciences Center, El Paso, Texas (N.K.S.)
6. Texas Tech University Health Sciences Center, El Paso, Texas (M.J.Z., J.M.)
7. University of North Carolina School of Medicine, Chapel Hill, North Carolina (D.S.R.)
8. University of North Carolina School of Medicine, Chapel Hill, North Carolina; Oregon Health & Science University, Portland, Oregon; and Portland VA Medical Center, Portland, Oregon (S.D.C.).