Acknowledgements:
For technical support, we want to thank Paul van Hoof, Roelof-Jan van
der Lei, Geert Weijers, Andreas Boehmler and Markus Kaymer from the
Beckman Coulter team. We also want to thank the whole team of the
Nijmegen Exercise Study for their help with blood drawing and collection
of the questionnaire data. We want to thank Tjarda Tromp, for
coordinating the blood drawing procedures.