Jon Nissen-Meyer is a scientist at the Department of Biosciences at the University of Oslo. He can be contacted on [email protected]. Erik Boye is a Professor at the Institute for Molecular Biosciences, University of Oslo. He can be contacted on [email protected]. Bjarne Østerud is a Professor at the Department of Medical Biology at the University of Tromsø. He can be contacted on [email protected]. Tore Skotland is a Senior Scientist at Oslo University hospital. He can be contacted on [email protected].