During the 1990s, it was confirmed that Ender and Pollack were given performance-enhancing drugs during the East German doping scandal of the 1970s.
1990년대에 엔더와 폴락이 1970년대의 동독 도핑 스캔들이 일어난 동안 상연 강화 마약들이 주어졌다고 확증되었다.