Besides having kidney stones?
http://www.football365.com/story/0,17033...
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Relevant question
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Answer`s (2):
1. Kevin K
I remember that Sam Allardyce had a heart Problem 2 years ago

So I set ut some rulesfor Wenger

1) Thou shall not shout at Eboue, becos he plays worse than before you screamed at him.

2) Thou shall not place Diaby and Song in th central agian, try Diaby and ramsey if it works

3) If thy team annoys you guve them a stern eye they will know

and others
2. fuxake
Stomach ulcers, and other stress related injuries. Especially if you have a russian oil billionaire breathing down your neck.