Sun, Kainan*; Steck, Daniel J.†; Field, R William‡
* Department of Occupational and Environmental Health, Department of Biostatistics, College of Public Health, University of Iowa, Iowa City, IA 52242; † Department of Physics, St. John’s University, 109 Science Center, Collegeville, MN 56321; ‡ Department of Occupational and Environmental Health, Department of Epidemiology, College of Public Health, N222 Oakdale Hall, University of Iowa, Iowa City, IA 52242.
For correspondence contact: Bill Field, Department of Occupational and Environmental Health, Department of Epidemiology, College of Public Health, N222 Oakdale Hall, University of Iowa, Iowa City, IA 52242, or email at [email protected].
(Manuscript accepted 10 March 2009)
doi: 10.1097/HP.0b013e3181ac4c15