![](/s.abcnews.com/images/health/ht-formally-conjoined-twins-hb-170207_16x9t_240.jpg)
yet these drugs are not a "home run," says elizabeth loder, md, a professor of neurology at harvard medical school and chief of the division of headache at brigham & women's hospital. .
![](#trump-10-gty-er-180508_hpmain_16x9t_240.jpg)
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