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  1. Doctor explains that the blood brain barrier is not fully developed til 7 years of age

    Doctor explains that the blood brain barrier is not fully developed til 7 years of age

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  5. This is so disturbing! 😳 (Blood-Brain Barrier)

    This is so disturbing! 😳 (Blood-Brain Barrier)

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  8. This is so disturbing! 😳

    This is so disturbing! 😳

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