Clinical oncologist with almost 50 years of experience in Slovakia and the USA. At the beginning of seventies, he introduced tumor immunotherapy in Slovakia. He continued his research on tumor immunology at the National Cancer Institute in Bethesde. He completed his qualifications at Georgetown University in Washington and later taught medics and young doctors. After the revolution, he returned to Slovakia and founded the National Oncology Institute, which he led with breaks for 10 years. For political reasons, he went to the USA again, where he founded his own oncology center.  He is currently running a project focused on the use of digitization and artificial intelligence in the management of oncology patients and is the director of Onko Alliance Slovensko.