This paper deals exactly with that.
Iris Atzmon
[http://www.buergerwelle.de:8080/helma/twoday/bwnews/search?q=brain+cancer
http://omega.twoday.net/search?q=brain+cancer
http://www.buergerwelle.de:8080/helma/twoday/bwnews/search?q=brain+tumor
http://omega.twoday.net/search?q=brain+tumor
http://www.buergerwelle.de:8080/helma/twoday/bwnews/search?q=brain+tumour
http://omega.twoday.net/search?q=brain+tumour
http://www.buergerwelle.de:8080/helma/twoday/bwnews/search?q=Hardell
http://omega.twoday.net/search?q=Hardell
http://www.buergerwelle.de:8080/helma/twoday/bwnews/search?q=Michael+Carlberg
http://omega.twoday.net/search?q=Michael+Carlberg
http://omega.twoday.net/search?q=Kjell+Hansson+Mild
http://www.buergerwelle.de:8080/helma/twoday/bwnews/search?q=Michael+Kundi
http://omega.twoday.net/search?q=Michael+Kundi ]