So it was against the run of play when Southend took a shock lead - with Scolari's new zonal marking system exposed at the first opporunity - as Barrett headed in Stanislas's corner unmarked from eight yards.

BBC: Southend 1-4 Chelsea

Met-Mex insists that none of the children in its database of previously exposed patients exhibits long-term effects associated with lead poisoning.

ECONOMIST: Lead pollution has caused a lasting public-health blight

That video exposed a blackmail scandal that lead to the eventual arrest of 11 high-ranking city officials.

BBC: How serious is China on corruption?

He feared he might suffer from Stendhal's Syndrome - a psychological reaction that can occur when a person is exposed to a very well known, very beautiful painting - which can lead to palpitations and dizziness.

BBC: Too famous to see?

Lead researcher Dr Ronit Peled, from Ben-Gurion University, said that women who had been exposed to a number of negative events should be considered an "at-risk" group for breast cancer.

BBC: Positive thinkers 'avoid cancer'