From Thomas Smith
Your story linking sleep disturbance and mental illness (28 January, p 12) did not mention the worrying corollary that maybe jet lag has more profound effects on mental functioning than just making us tired.
The fact that many important decisions are made by people who have just stepped off an intercontinental flight is enough reason for concern. The possibility that jet lag impairs judgement in other ways deserves serious investigation.
Saint Louis, France
