• Disney and Philips do not, as Feedback appeared to suggest (3 June), share the same patent numbers. The Disney patent described was correctly numbered as US20050232612. The correct number for the Philips patent is US20060070095.
• In the item on testing for illnesses, we gave the impression that in England women over 70 are no longer entitled to free routine breast screening (3 June, p 44). This is not the case. Over-70s no longer receive invitations but are still able to make their own appointment.
