27 May 2012 - 11:07 pm NZ time
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Updated at 12:20 pm on 3 February 2012
The South Korean sprinter Lim Hee-Nam and Portugal's European 5,000 metres bronze medallist Sara Moreira have received six-month bans from the International Association of Athletics Federations for doping.
Both athletes tested positive for the stimulant methylhexanamine at last year's world championships in Daegu, South Korea.
Lim's suspension runs until April the 10th, while Moreira's will expire on March the 7th.
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