UCSF Tobacco Research Center, San Francisco, California, United States
Kisumu County Hospital, Kisumu, Kenya
Lumumba Health Center, Kisumu, Kenya
Jaramogi Oginga Odinga Teaching and Referral Hospital (JOOTRH), Kisumu, Kenya
University of California, San Francisco, San Francisco, California, United States
University of California, San Francisco, San Francisco, California, United States
University of Washington, Seattle, Washington, United States
UCSF, San Francisco, California, United States
University of California San Francisco, San Francisco, California, United States
IDRC- Tororo Research Clinic and Tororo District Hospital, Tororo, Uganda
MGH campus, Busia, Uganda
John Muir Medical Center, Concord, California, United States
John Muir Medical Center, Walnut Creek, California, United States