© 2018 USTPA. The USTPA is the copyright owner of all information contained herein. Although the USTPA provides this information to anyone, with the exception of member only sections, the USTPA retains the copyright for all text and graphic images. This means that you CANNOT distribute the text or graphics to others without the express written permission of the USTPA; “mirror” or otherwise include the text or graphics on your own server or documents without our permission; or otherwise modify and/or re-use the text or graphics on this system. You MAY print copies of the information for your own personal use, store the files on your personal computer for your personal use only, and reference hypertext documents on this server in your own documents.