By the AP 's count , 16 walkers plus a distance runner who have trained under Chegin are serving .
By the AP 's count , 16 walkers plus a distance runner who have trained under Chegin have served doping bans since 2005 .
By the AP 's count , 16 walkers plus a distance runner who have trained under Chegin are serving or have served doping bans since 2005 .