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Iversen MM, Espehaug B, Hausken MF, Graue M, Østbye T, Skeie S, Cooper JG, Tell GS, Günther BE, Dale H, Smith-Strøm H, Kolltveit BC, Kirkevold M, Rokne B.Iversen MM, et al.JMIR Res Protoc. 2016 Jul 18;5(3):e148. doi: 10.2196/resprot.5646.JMIR Res Protoc. 2016.PMID: 27430301Free PMC article.