1. Åstrand Laboratory of Work Physiology, University College of Physical Education and Sports, Stockholm, Sweden, , Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
2. Åstrand Laboratory of Work Physiology, University College of Physical Education and Sports, Stockholm, Sweden, Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
3. Åstrand Laboratory of Work Physiology, University College of Physical Education and Sports, Stockholm, Sweden, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden