Dear members,

We are deeply saddened to lose our dear friend and EHOG Russian Ambassador Prof. Nikolai N. Tupitsyn, who has been with us for many years. Despite all the difficulties, he chaired the "Haematopoiesis Immunology Conference" every year for 20 years and was the editor-in-chief of the "Haematopoiesis Immunology Journal".

He was a valuable person who came to our congresses almost every year and did his best to bring our young Russian colleagues along every time he came. He was a friend to us, and above all, an incredible colleague who did his job well and supported the young assistants of his country.

When a friend passes away, a part of us goes too. It was an honor to have known such a great person. Sincere condolences to the entire hematology community.

Best Regards,

Hematology Specialist Association