[1] Univ Birmingham, Sch Sport & Exercise Sci, Birmingham B15 2TT, W Midlands, England
[2] Univ Birmingham, Div Immun & Infect, Birmingham B15 2TT, W Midlands, England
[3] Univ Birmingham, Canc Res UK Inst Canc Studies, Birmingham B15 2TT, W Midlands, England
[4] Heidelberg Univ, Mannheim Med Fac, Mannheim Inst Publ Hlth Social & Prevent Med MIPH, D-6900 Heidelberg, Germany