1 Fred Hutchinson Cancer Research Center, Seattle, WA, USA; University of Washington, Seattle, WA, USA. Electronic address: [email protected].
2 Caring Cross, Gaithersburg, MD, USA.
3 Fred Hutchinson Cancer Research Center, Seattle, WA, USA; Joint Clinical Research Centre, Kampala, Uganda.
4 University of Washington, Seattle, WA, USA; Caring Cross, Gaithersburg, MD, USA; Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA, USA.
5 Joint Clinical Research Centre, Kampala, Uganda.