• In the look at off-the-scale pH bunkum (24 September), Feedback’s earlier reference to alkaline water was in our 20 August issue.
• Chyi-Song Hsieh, who featured in our story on T-cells (24 September, p 21), is male, not female as stated.
Letter: For the record
Published 5 October 2011
Issue no. 2833 published 8 October 2011
