Martijn Hagens, VUmc researcher, published ( BMC Health Services Research 2014, 14:455) the results of his cross sectional research into the practice of the counsellors cooperating with De Einder (one of the Dutch RtD Societies and member of WFRtDS). Of the 595 clients (of 12 counsellors) included in his research, 1/3 rd had no direct wish to end their life, but were apparently looking for reassurance in anticipation of prospective suffering. 16% had a direct and urgent wish to end their life.
The article gives a good insight in the working principles and effects of the counsellors and their intervention. Read it here.