We expect more than 500 international participants at the 5th Intl Meeting 2009 of the Stem Cell Network North Rhine-Westphalia. The meeting will be held at the Eurogress in Aachen (Germany). For further information concerning the program, the speakers etc. please visit our website http://www.kongress.stammzellen.nrw.de/en/Home.php . Attendance at the congress is free of charge. Please register in advance at www.congress.stemcells.nrw.de .