PLoS is a nonprofit organization of scientists and physicians committed to making the world's scientific and medical literature a freely available public resource.


[Library of Congress]
Some historical messages still make sense.
New content is added to IP Monday through Friday. See you again on Monday.
IP was recently honored by its selection as an Editors' Choice for the Intute database. Intute is a very useful service that deserves a visit.
New content is added to IP Modays through Fridays. See you again on Monday.