By Sandra Lamb

May 9, 2017

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Each night before "Greg" goes to bed he brushes and flosses his teeth. Then

he double-checks the instructions on the dark brown bottle his nurse gave

him before he unscrews the cap and tips five drops of a light-amber, oily

liquid onto a spoon. The brew, glistening from the light of the bathroom

fixture, is tasteless and has no odor he can detect. But it's chock-full of



He sloshes the substance around in his mouth and swallows.