Nature 433, 164–176 (2005)

It has been drawn to Nature's attention that A.K. M., S. K. and K. M. were named as inventors on a patent application relevant to this work (patent number WO 2005/063991) in 2004, which should therefore have been formally declared as a competing financial interest. The authors' non-profit institutions filed for patent protection to promote the development and distribution of malaria vaccines to people in need worldwide, in accordance with a global access strategy1.