Erratum: Lattice study of the two-photon decay widths for scalar and pseudo-scalar charmonium [Chin. Phys. C 44(8), 083108 (2020)]

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Zuoheng Zou, Yu Meng, and Chuan Liu, Lattice calculation of χ_c0→2γ decay width, 11 (2021), arXiv:2111.00768