Development of High Performance Liquid Chromatography-Tandem Mass Spectrometry Method for the Detection of Tulathromycin in Swine Plasma oleh Xian-hui HUANG, Yong-da ZHAO, Li-min HE, Zi-sen LIANG, Li-li GUO, Zhen-ling ZENG, Zhang-liu CHEN, Min ZHANG, Bing-hu FANG