The basic course will not be given Zurich.   It has been replaced by a course in Rotterdam (May 25-June 2, 1999) and a course in Bratislava (June 14-18, 1998).   For further information on the Rotterdam course please contact Lodewijk Sandkuijl sandkuyl@rullf2.LeidenUniv.nl.  For additional information on the Bratislava course click here to obtain information from the webpage.