Belgian database
One can find all products in "a medical need program' in Belgium (not only in hematology) on the website of the Federal Agency for Medicines and Health Products (FAMHP)
What's a Medical Need Program?
A Medical need program is the use of medicinal products in an indication that
is not yet approved - because its authorization procedure by health
authorities is still ongoing - in the case of patients who suffer from a
chronic or serious illness and who cannot be treated with a medicine
available on the market.