(D-Ser2) oxyntomodulin recovers hippocampal synaptic structure and theta rhythm in Alzheimer’s disease transgenic mice oleh Guang-Zhao Yang, Qi-Chao Gao, Wei-Ran Li, Hong-Yan Cai, Hui-Min Zhao, Jian-Ji Wang, Xin-Rui Zhao, Jia-Xin Wang, Mei-Na Wu, Jun Zhang, Christian Hölscher, Jin-Shun Qi, Zhao-Jun Wang