We apologise for a technical error that resulted in the omission of the names and addresses of the first two authors of the first letter in this cluster of two letters (10 August, p 338). The authors should have been published as follows.
David G Bartle senior house officer paediatricsRoyal United Hospital Bath, Bath BA1 3NG dbartle1@hotmail.com
F O Finlay consultant paediatrician in community child healthChild Health Department, Banes Primary Care Trust, Bath BA1 3QE
S Guiton veterinary surgeon12 Ruby Place, Bath BA2 4EH