The editor is happy to present volume 30, a Jubilee volume, to the read- ers of "Progress in Drug Research". In the 27 years of its existence, this series of monographs has published more than three hundred suvey- articles covering almost all aspects of drug research, thus providing the opportunity of using the monographs for encyclopedic information. It is the editor's hope that the new volume, which contains 12 contribu- tions, will also be interesting...