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    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease. — Stock Photo
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease.
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease. — Stock Photo
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease.
    Computer generated image of capsules modeled on sample of fluoxetine — Stock Photo
    Computer generated image of capsules modeled on sample of fluoxetine
    Computer generated image of capsules modeled on sample of fluoxetine — Stock Photo
    Computer generated image of capsules modeled on sample of fluoxetine
    Computer generated image of capsules modeled on sample of fluoxetine — Stock Photo
    Computer generated image of capsules modeled on sample of fluoxetine
    Computer generated image of capsules modeled on sample of fluoxetine — Stock Photo
    Computer generated image of capsules modeled on sample of fluoxetine
    Computer generated image of capsules modeled on sample of fluoxetine — Stock Photo
    Computer generated image of capsules modeled on sample of fluoxetine
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Apoptosis of neuron cell — Stock Photo
    Apoptosis of neuron cell
    Apoptosis of neuron cell — Stock Photo
    Apoptosis of neuron cell