Ultra-high-performance liquid chromatography for the determination of exenatide in monkey plasma by tandem quadrupole mass spectrometry oleh Jin-Feng Zhang, Chun-Jie Sha, Yu Sun, Yun-Yun Gai, Ji-Ye Sun, Jiang-Bin Han, Xin Shao, Chun-Na Sha, You-Xin Li, Wan-Hui Liu