[1] Newcastle Univ, Mitochondrial Res Grp, Inst Ageing & Hlth, Newcastle Upon Tyne NE2 4HH, Tyne & Wear, England
[2] Newcastle Univ, Inst Cellular Med, Newcastle Magnet Resonance Ctr, Newcastle Upon Tyne NE4 5PL, Tyne & Wear, England
[3] Newcastle Upon Tyne Hosp NHS Fdn Trust, Freeman Hosp, Dept Cardiol, Newcastle Upon Tyne NE7 7DN, Tyne & Wear, England
[4] Newcastle Univ, Inst Med Genet, Newcastle Upon Tyne NE2 4HH, Tyne & Wear, England