Jan 30 (Reuters) - Former world number one Vijay Singh has admitted using deer antler spray, but says he was unaware the extract contained an insulin-like growth factor that is banned by the PGA Tour.
(Reuters) - Former world number one Vijay Singh has admitted using deer antler spray, but says he was unaware the extract contained an insulin-like growth factor that is banned by the PGA Tour. Fijian ...
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