She said three recent major reports had identified the high level of staff absenteeism in the NHS, with the main causes being mental health issues -particularly stress - and back problems.

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The main hormone produced during stress is cortisol, which causes aggression and and mood problems.

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And while the current Colosseum project aims to improve visitor services in addition to cleaning and restoring the amphitheater, Quaedvlieg-Mihailovic believes that its underlying problems also need to be addressed -- the main one being the car traffic that surrounds the site and causes the exterior to be tarnished with pollution.

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