Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Ehlers-Danlos syndrome ?
    ### Response:
    Ehlers-Danlos syndrome is a group of disorders that affect the connective tissues that support the skin, bones, blood vessels, and many other organs and tissues. Defects in connective tissues cause the signs and symptoms of Ehlers-Danlos syndrome, which vary from mildly loose joints to life-threatening complications.
    