Copyright, License, and Disclaimer. This publication is (C) Copyright 1994 by Vesselin Bontchev and the Virus Test Center at the University of Hamburg. Permission is granted to everybody to distribute copies of this information in electronic form, provided that this is done for free, the contents of the information is not changed in any way, and the source of the information is clearly mentioned. Those who want to re-publish the information as a whole or in parts in printed form, MUST contact Vesselin Bontchev or the VTC-Hamburg and obtain permission first. No responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or idea contained in the material herein.