αιτιώδη παράγοντα τραγικών δυστυχημάτων http://www.hse.gov.uk/humanfactors/topics/fatigue.htm http://www.hse.gov.uk/humanfactors/topics/fatigue.htm http://www.hse.gov.uk/humanfactors/topics/fatigue.htm http://www.hse.gov.uk/humanfactors/topics/fatigue.htm 3.5 million people in the UK http://www.hse.gov.uk/humanfactors/topics/fatigue.htm