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Ease of completing tasks, as reported by the participants. Ratings were on a scale of 1–7, where 1 = not easy at all and 7 = extremely easy. *P < 0.001 versus all pens; †P < 0.001 versus NovoPen 3; §P < 0.001 versus Lilly Luxura; |P < 0.05 versus NovoPen 4.
