1. i+HeALTH, European University Miguel de Cervantes , Valladolid , Spain
2. Research Institute of the Hospital 12 de Octubre (‘imas12’) , Madrid , Spain
3. Clinical Biochemistry Department , Hospital 12 de Octubre , Madrid , Spain
4. Fissac – Physiology, Health and Physical Activity , Madrid , Spain
5. Systems Biology Department , University of Alcalá , Madrid , Spain
6. Faculty of Sport Sciences , Universidad Europea de Madrid , Madrid , Spain
7. Biomedical Research Networking Center on Frailty and Healthy Aging (CIBERFES) , Madrid , Spain
8. Mitochondrial Disorders Laboratory , “Hospital 12 de Octubre” and Spanish Biomedical Network for Rare Disorders (CIBERER) , Madrid , Spain