However , due to political repression from the czarist government , the university was temporarily closed in 1905 .
When he was 7 years old , the family returned to the Polish capital where he attended school and started his medical studies at the Imperial University of Warsaw .
Due to political repression from the czarist government , the university was temporarily closed in 1905 .
When he was 7 years old , the family returned to the Polish capital where he attended school and started his medical studies at the Imperial University of Warsaw .