Key data 'missing' in drug trial

Key information was absent from a research file prior to a London drug trial that left six men seriously ill, investigators have concluded.

Drug research experts from the Netherlands say UK regulators did not receive findings that might have warned them of damage TGN1412 could do.

The worst affected of the six men, Ryan Wilson, had fingers and toes amputated, and his future health is uncertain.

In The Lancet, the authors propose a system of extra checks for trial drugs.