Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the treatments for Gastrointestinal Stromal Tumors ?
    ### Response:
    Key Points
                    - There are different types of treatment for patients with gastrointestinal stromal tumors.    - Four types of standard treatment are used:         - Surgery     - Targeted therapy     - Watchful waiting     - Supportive care        - New types of treatment are being tested in clinical trials.
    