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<author-notes>
<corresp id="c1-ETM-26-6-12261">
<italic>Correspondence to:</italic> Professor Zhiming Zheng, Department of Neurosurgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jingwu Road, Jinan, Shandong 250021, P.R. China
<email>doctor_pan0529@126.com zhiming0119@126.com </email>
</corresp>
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In some cases, there are multiple emails separated by spaces in an author email reference.
E.g. PMC10632954