http://www.emboj.org/cgi/search?volume=&firstpage=&author1=Bahnsen%2C+U.&author2=
&titleabstract=&fulltext=&fmonth=Jan&fyear=1990&tmonth=Apr&tyear=2001&hits=
10&sendit=Search&journalcode=emboj&fdatedef=1+January+1984&tdatedef=2+April+2001