Oregon Research Institute, Eugene, Oregon, United States
University of MN's Tobacco Use Research Center, Minneapolis, Minnesota, United States
West Virginia University, Morgantown, West Virginia, United States
KDWB University Pediatrics Family Center (UMP Stand alone clinic), Minneapolis, Minnesota, United States
University of Minnesota Transplant Information Services, Minneapolis, Minnesota, United States
University of Minnesota, Minneapolis, Minnesota, United States
University of Maryland Baltimore, Baltimore, Maryland, United States
Brigham and Women's Hospital, Boston, Massachusetts, United States
Reliant Medical Group, Worcester, Massachusetts, United States
Clinical and Translational Science Institute, Minneapolis, Minnesota, United States
FUNCEI, Buenos Aires, Argentina
Infectious Diseases Associates NW FL, PA, Pensacola, Florida, United States
George Washington Medical Faculty Associates, Washington, D.C., District of Columbia, United States
Hospital Nacional Arzobispo Loayza, Lima, Peru
Hospital Nacional Guillermo Almenara Irigoyen, Lima, Peru
UCSD Antiviral Research Center, San Diego, California, United States
University of Minnesota, Minneapolis, Minnesota, United States
University of MN's Tobacco Use Research Center, Minneapolis, Minnesota, United States
University of Minnesota, Duluth, Minnesota, United States