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. 2020 Nov 1;35(11):1840–1852. doi: 10.1093/ndt/gfaa200

FIGURE 4.

FIGURE 4

The minimally invasive treatment device. A plastic tube with inflatable tip of thin latex. (A) The tube is inserted in the left nostril and (B) secured in position by a specially designed headband [129]. Images reprinted with permission from Headache.