Marathon world record holder Ruth Chepngetich has been provisionally suspended by the Athletics Integrity Unit after testing positive for Hydrochlorothiazide in a test on March 14th. Hydrochlorothiazide can be used to mask the presence of banned drugs. The minimum reporting concentration is 20 ng/mL. The AIU notes she had an estimated concentration of 3800 ng/mL in urine. The positive test …
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