Stulce had returned from a 1990 two-year doping ban just in time to win the gold medal at the Barcelona Olympics.
In 2002 she was given a four-year doping ban after a failed test for norandrosterone, a metabolite the steroid nandrolone.
He was later stripped of that result when his doping ban was imposed.
In his first full season after his doping ban, he returned to the top level of competition.
She received a two-year doping ban from November 2007 to 2009.
Medina got one-year doping ban stemming from positive drug tests.
Spence received a three-month doping ban for the infraction.
In 1997 he received a three-month doping ban for ephedrine use.
In September 2010 he got 2-year doping ban.
Athletes who have served a doping ban of two years or more are ineligible.