Psychotherapie-Berufsausbildung in Österreich: Basis- und soziodemographische Hintergrunddaten aus einer SPRISTAD-Pilotstudie (Society of Psychotherapy Research Interest Section on Therapist Training and Development) [Psychotherapy training in Austria: Baseline and socio-demographic background data from a SPRISTAD (Society of Psychotherapy Research Interest Section on Therapist Training and Development)-Pilotstudy]