Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Laron syndrome ?
    ### Response:
    What causes Laron syndrome? Laron syndrome is caused by changes (mutations) in the GHR gene. This gene encodes growth hormone receptor, which is a protein found on the outer membrane of cells throughout the body. Growth hormone receptor is designed to recognize and bind growth hormone, which triggers cellular growth and division.
    