University of Illinois, Chicago, Chicago, Illinois, United States
University of Chicago Medical Center, Chicago, Illinois, United States
Institute For Advanced Studies in Aging, Falls Church, Virginia, United States
Duke Center for Nicotine and Smoking Cessation Research, Winston-Salem, North Carolina, United States
Duke University Medical Center, Durham, North Carolina, United States
Duke University Medical Center, Durham, North Carolina, United States
Duke University Dept. of Community and Family Medicine, Durham, North Carolina, United States
Duke University Medical Center, Durham, North Carolina, United States
Duke University Medical Center, Durham, North Carolina, United States
Massachusetts General Hospital, Boston, Massachusetts, United States
Brigham and Womens Hospital, Boston, Massachusetts, United States
Duke University Medical Center, Durham, North Carolina, United States
Duke University Medical Center, Durham, North Carolina, United States
Duke University Medical Center, Durham, North Carolina, United States