Diana Kipyokei, winner of the 2021 Boston Marathon, has been provisionally suspended for anti-doping rule violations. Her compatriot and fellow marathon runner Betty Lempus was also suspended, the Athletics Integrity Unit said in a statement on Friday. “These alleged anti-doping rule violations stem from probes into theinformation provided by the athletes to explain Adverse Analytical Findings (AAF) for metabolites of triamcinolone acetonide in samples they provided during in-competition tests last year,” the statement said. Kipyokei’s sample was collected following her Boston victory and she …