1 Department of Physiology and Pharmacology, Biomedicum, Karolinska Institutet, 171 77 Stockholm, Sweden.
2 Institute of Sport Science and Innovations, Lithuanian Sports University, 44221 Kaunas, Lithuania.
3 Murdoch Children's Research Institute, The Royal Children's Hospital Melbourne, Melbourne, VIC 3052, Australia; Department of Paediatrics, Melbourne Medical School, University of Melbourne, Melbourne, VIC 3010, Australia.
4 Department of Physiology and Pharmacology, Biomedicum, Karolinska Institutet, 171 77 Stockholm, Sweden; Heart, Vascular and Neurology Theme, Cardiology Unit, Karolinska University Hospital, 171 76 Stockholm, Sweden.
5 Institute of Sport Science and Innovations, Lithuanian Sports University, 44221 Kaunas, Lithuania. Electronic address: marius.brazaitis@lsu.lt.
6 Department of Physiology and Pharmacology, Biomedicum, Karolinska Institutet, 171 77 Stockholm, Sweden; Institute of Sport Science and Innovations, Lithuanian Sports University, 44221 Kaunas, Lithuania. Electronic address: hakan.westerblad@ki.se.