Dr. Nils Kaiser

Expression of thanks

I am greatly indebted to "The Foundation Association of German Industry" (Stifterverband der Deutschen Industrie") and particularly to its president at that time Dr. E. H. Vits, as well as to the DFG, the BMFT and the Max Planck Institute for the long years of backing and support for my work.

A very special word of thanks goes to Professor W. Heisenberg, who by recognising the importance of interdisciplinary research very generously made it possible for me to work in his MPI for Physics in Munich as a doctor of medicine at the beginning of my work.