Jessica Roessler, Ole Ammerpohl, Jana Gutwein, Britta Hasemeier, Sumadi L Anwar, Hans Kreipe and Ulrich Lehmann*
* Corresponding author: Ulrich Lehmann Lehmann.Ulrich@MH-Hannover.de
BMC Research Notes 2012, 5:210 doi:10.1186/1756-0500-5-210