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A Biofeedback App for Migraine: Development and Usability Study.
Ingvaldsen SH, Tronvik E, Brenner E, Winnberg I, Olsen A, Gravdahl GB, Stubberud A. Ingvaldsen SH, et al. Among authors: winnberg i. JMIR Form Res. 2021 Jul 28;5(7):e23229. doi: 10.2196/23229. JMIR Form Res. 2021. PMID: 34319243 Free PMC article.