International scientific networking had been considerably restricted after 1948. The reasons were political as well as financial. Restrictions included attendance at international congresses abroad as well as organization of international professional events in CSSR. Czechoslovak Hematology Society strived for breaking up this isolation by initiating and organizing bilateral conferences with societies of hematology in Poland, the then GDR and Hungary. Furthermore, Prague hosted 3 important international professional events before 1989: Symposium on the role of blood platelets in haemostasis and thrombosis in 1971 (Secretary General P. Pudlák), II. Congress of the International Society of Hematology – European and African Division in 1973 (ISH – EAD) (Secretary General L. Donner) and Current approaches to lymphoproliferative disorders therapy in 1985 (Secretary General P. Klener). The paper lists the difficulties and hurdles that had to be overcome when attempting to travel abroad or to organize an international event.
Key words: Czechoslovak Society of Hematology – International scientific activities 1951–1989
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