With great pleasure I welcome you to the City of Groningen. In more than one way there is cause for celebration. Today marks the third lustrum of the annual international sympo­ sium on blood transfusion, organized by the Rode Kruis Bloedbank Groningen-Drenthe. In my opinion it has been a remarkable initiative of the Bloedbank, to start organizing a scientific conference, as it did, in 1976. It meant, among others, that in case of success the initiative would grow to be an annual item on the international congress calen­ der. It also meant that a possible third lustrum would coincide with the celebration of the 950th anniversary of the City of Groningen. I am happy to note that the initiative has been successful: over the past fourteen years the Rode Kruis Bloedbank Groningen-Drenthe has succeeded in organizing an annual symposium on blood transfusion, with a different theme each year, and with an average attendance of 250 participants from some 26 countries world-wide. The platform created with the special formula of the symposium, for science and industry, has been well balanced and beneficial to both. Mr. Chairman, ladies and gentlemen, I like to compliment the organizers with the success that they have attained. Allow me to men­ tion the name of just one person, in whom I like to thank everyone who has been involved in creating the annual Bloedbank-symposia: my warm congratulations to Dr. Smit Sibinga and his staff.