You can read Anthony's letter and the full story on the BBC's website.
Blue Peter gold badge for University Professor

Anthony Hollander aged nine.

Anthony Hollander.
Press release issued: 27 January 2009
The BBC children’s programme, Blue Peter, has awarded Professor Anthony Hollander their prestigious gold medal for his involvement in one of the most revolutionary medical operations of recent times.
The BBC children’s programme,
Blue Peter, has awarded Professor Anthony Hollander their prestigious
gold medal for his involvement in one of the most revolutionary medical operations of recent times that saved the life of
Claudia Castillo, 35 years after he wrote them a letter that seems to have foretold his destiny.