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Dr. Hargrove and her colleagues have modified various versions of a blood-pressure drug called amiloride so that they can latch onto viral RNA.

Weightlifter Onua, who tested positive for the diuretic Amiloride, received an eight-year ban after multiple violations.

Amalaha was initially suspended on Tuesday after the "A'' sample tested positive for amiloride and hydrochlorothiazide, which are both banned by the World Anti-Doping Agency. Organizers said Friday the "B'' sample also came back positive.

Amalaha was initially suspended on Tuesday after the “A” sample tested positive for amiloride and hydrochlorothiazide, which are both banned by the World Anti-Doping Agency.

Chika Amalaha tested positive for the diuretic amiloride and masking agent hydrochlorothiazide - both banned by the World Anti-Doping Agency - after winning the 53-kilogram weight class last Friday, games officials said.