David Challen has been appointed to the board of directors of Amersham PLC, Amersham Biosciences’ UK-based parent company. Challen is currently vice-chairman of Citigroup’s European Investment Bank. Prior to this, Challan was co-chairman at Schroder Salomon Smith Barney, after Schroder’s investment banking business — where he was chairman — merged with Salomon Smith Barney.

Story Landis has been appointed director of the National Institute of Neurological Disorders and Stroke.