This repository contains workflowdata and the intervention itself. The data describe the process of developing the decision aid and includes the flowchart of the development process of the decision aid for advanced therapies in Parkinson's disease. The complete decision aid is included. Data gained from other studies to develop the decision aid are stored in the associated repositories (DAC). This repository does not contain data on humans/personal data as it only describes the processs of developing the decision aid and the decision aid itself. The data are (mostly) decribed in Dutch.