Footnotes indicating grant support were omitted from the two articles on Non-Traumatic Necrosis of the Femoral Head by William G. Boettcher, Michael Bonfiglio, and their associates published in the March 1970 issue of The Journal, pages 312 through 329. The footnote for each article should read:
Supported in part by USPH Grant AM 5305, by Department of Orthopaedic Surgery Trust Fund, and by Clinical Research Center Grant # MOI-FR-59.