Originally posted by P4P305
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"During the 2008 Beijing Olympics, anti-doping expert Dr. Catlin himself used blood screening to test about 1,000 athletes for HGH. Not one blood sample tested positive and that further questions the effectiveness of blood screening as an HGH testing technique."
Epo was found in Marion Jones urine sample in 2006,. yet it was not detected in her blood.
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