Interpretations of galactic center gamma-ray excess confronting the PandaX-II constraints on dark matter-neutron spin-dependent scatterings in the NMSSMLiangliang Shang, Yangle He, Jingwei Lian and Yusi PanEur. Phys. J. C, 78 5 (2018) 390DOI: https://doi.org/10.1140/epjc/s10052-018-5827-8