Sorry, I missed the original mail. Do you really want to adminster Tc-99 or are you talking about Tc-99m? This would be quite a difference! Franz Schoenhofer Habichergasse 31/7 A-1160 WIEN AUSTRIA/EUROPE Tel./Fax: +43-1-4955308 Tel.: +43-664-3380333 e-mail: schoenho@via.at