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                     <Month>12</Month>
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                  <ArticleTitle Language="En" OutputMedium="All">Erratum to: <InlineEquation ID="IEq1">
                        <EquationSource Format="TEX"><![CDATA[$$\pi ^-p\rightarrow \eta ^{(\prime )} \pi ^- p$$]]></EquationSource>
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                                 <msup>
                                    <mi>π</mi>
                                    <mo>-</mo>
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                                 <mi>p</mi>
                                 <mo stretchy="false">→</mo>
                                 <msup>
                                    <mi>η</mi>
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                                    <mi>π</mi>
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                     </InlineEquation> in the double-Regge region</ArticleTitle>
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                        <Month>8</Month>
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                           <Emphasis Type="Bold">Open Access</Emphasis>This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (<ExternalRef>
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                              <RefTarget Address="http://creativecommons.org/licenses/by/4.0/" TargetType="URL"/>
                           </ExternalRef>), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.</SimplePara>
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                     <Para>A Correction to this paper has been published: 10.1140/epjc/s10052-021-09420-1</Para>
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