F. Kruck It is a great pleasure for me to welcome you to the workshop on Natriuretic Hormone here in Bonn. For quite a long time we have been considering the possibility of assem bling scientists who are concerned with and interested in the problem of a possible humoral natriuretic activity. Work has been done on this topic in different parts of the world, partially with different methods and sometimes also with different and contlict ing results. And thus we thought it could be very beneficial to have personal discussions with all of you so as to reach a consensus of opinion on how studies...