F M Galassi1, F J Rühli2. 1. University of Zurich, Institute of Evolutionary Medicine (IEM), Winterthurerstrasse 190, 8057, Zurich, Switzerland. francesco.galassi@iem.uzh.ch. 2. University of Zurich, Institute of Evolutionary Medicine (IEM), Winterthurerstrasse 190, 8057, Zurich, Switzerland.