Up the down staircase

E RRATUM Up the down staircase David Wallach © 2002 Nature Publishing Group http://www.nature.com/natureimmunology Nature Immunology 3, 802–803 (2002). In this article, the name of the first author of reference 3 was spelled incorrectly in the both text and reference list. The correct spelling in Pomerantz. 984 nature immunology • volume 3 no 10 • october 2002 • www.nature.com/natureimmunology  (...truncated)