The Journal of Experimental Medicine, Vol. 125, No. 1, January 1, 1967, page 180, Fig. 1.
Owing to a printing error Fig. 1 was oriented incorrectly on the page. The position of the above figure is correct, and it should replace the figure on page 180. The legend and text are correct as originally printed.
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Copyright © 1967 by The Rockefeller University Press
1967
