In 1847 he received a call from the medical academy of St. Petersburg , where he was the first prosector of Nikolai Pirogow .
Under his teacher Josef Hyrtl , Gruber developed into an outstanding anatomist .
In 1847 Gruber received a call from the medical academy of St. Petersburg , where Gruber was the first Gruber of Nikolai Pirogow .
Under his teacher Josef Hyrtl , Gruber developed into an outstanding anatomist .