I would like to know this as well but I assume that information isn't available
One of the doctors involved (Lieve Thienpont) actually wrote a book, but it's in dutch. It's called "libera me" and is about psychological patiens and euthanasia.
http://www.witsand.be/boekvoorstelling-libera-me.html
She's part of an ethical commission of psychiatrists and doctors who are dealing with this subject on a daily basis (she was also mentioned in this interview).
BTW:
* In 2010-2011 there were 2086 requests for euthanasia in Belgium. 194 (9%) were for non-terminal patients and 58 patiënten (3%) were because of neuro psychological suffering (depression etc).