With reference to the retraction of the paper by Hannes Strasser and colleagues (Sept 6, p 789), I would like to clarify my role in this study.First, as a radiologist specialised in ultrasonography, my role was to do intraurethral ultrasonography before and after therapy,2 and to find out whether the stem-cell injections improved rhabdosphincter thickness and function. Furthermore, I was to assist Strasser during image-guided stem-cell injections.
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