At 53, Margarita is a woman who has faced more challenges than most people do in a lifetime. When I first met her, she was overwhelmed by debilitating headaches and near blindness. About 18 months earlier, her symptoms had started with headaches and subtle vision problems. But at the time, she and her family thought it was all tied to the devastating loss of her husband of more than 30 years. The grief of losing him had consumed her, and no one could have imagined that something else might be wrong.
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