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Intranasal sumatriptan powder delivered by a novel breath-actuated bi-directional device for the acute treatment of migraine: A randomised, placebo-controlled study - PG Djupesland, P Dočekal, , the Czech Migraine Investigators Group, the
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![Intranasal sumatriptan powder delivered by a novel breath-actuated bi-directional device for the acute treatment of migraine: A randomised, placebo-controlled study - PG Djupesland, P Dočekal, , the Czech Migraine Investigators Group, the Intranasal sumatriptan powder delivered by a novel breath-actuated bi-directional device for the acute treatment of migraine: A randomised, placebo-controlled study - PG Djupesland, P Dočekal, , the Czech Migraine Investigators Group, the](https://journals.sagepub.com/cms/10.1177/0333102409359314/asset/images/large/10.1177_0333102409359314-fig4.jpeg)