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. 2020 Aug 19;13:591–599. doi: 10.2147/CCID.S244598

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© 2020 Sattler et al.

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Investigators’ satisfaction questionnaire. The investigators (N = 6) were questioned about the easiness of ET3 and ET4 injection (very difficult; difficult; fairly easy; easy; very easy) and their willingness to use ET3 and ET4 for future treatment of subjects (no, not at all; no, not really; yes, to a certain extent; yes).