1. Mass Spectrometry Facility, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892, United States
2. State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences, Fudan University, Shanghai 200438, China
3. Center for Clinical Mass Spectrometry, Department of Pharmaceutical Analysis, Soochow University, Suzhou, Jiangsu 215123, China
4. School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China