Much of the information on this site is considered within the public domain. Unless stated otherwise, documents and files on NIH servers can be freely downloaded and reproduced.
NIH is not responsible for the availability or content of external sites. NIH does not endorse, recommend, warrant or guarantee the products, processes, services or information described or offered at other Internet sites. Documents sponsored by private companies and other non-NIH organizations may retain all rights to publish or reproduce such documents.
Some documents available from this server may also be protected under U.S. and foreign Copyright laws. Permission of the author(s) to reproduce these documents may be required.
The views and opinions of authors expressed on NIH websites do not necessarily state or reflect those of the U.S. Government and may not be used for advertising or product endorsement purposes.