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Vie, Anne Stavelin Methodological considerations in determining sex steroids in children: comparison of conventional immunoassays with liquid chromatography-tandem mass spectrometry Carina Ankarberg-Lindgren, Charlotte Becker, Emilia Svala, Henrik Ryberg From “wet” matrices to “dry” blood spot sampling strategy: a versatile LC-MS/MS assay for simultaneous monitoring caffeine and its three primary metabolites in preterm infants Hao-Ran Dai, Hong-Li Guo, Wei-Jun Wang, Xian Shen, Rui Cheng, Jing Xu, Ya-Hui Hu, Xuan-Sheng Ding, Feng Chen A sensitive LC-MS/MS methotrexate assay capable of assessing adherence to methotrexate therapy in rheumatoid arthritis Malcolm P. McTaggart, James Bluett, Brian G. Keevil Determination of cortisone and cortisol in human scalp hair using an improved LC-MS/MS-based method Mina Mirzaian, Sofie K.M. van Zundert, Wim F. 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Leber, Felix Gunzer, Tanja Langsenlehner, Wilfried Renner Optimized procedure for high-throughput transcriptome profiling of small extracellular vesicles isolated from low volume serum samples Petra Vychytilova-Faltejskova, Sara Vilmanova, Lucie Pifkova, Tina Catela Ivković, Marie Mᶏdrzyk, Robin Jugas, Tana Machackova, Jan Kotoucek, Milana Sachlova, Lucia Bohovicova, Teodor Stanek, Jana Halamkova, Igor Kiss, Ondrej Slaby Ultra-short cell-free DNA fragments enhance cancer early detection in a multi-analyte blood test combining mutation, protein and fragmentomics Fenfen Wang, Xinxing Li, Mengxing Li, Wendi Liu, Lingjia Lu, Yang Li, Xiaojing Chen, Siqi Yang, Tao Liu, Wen Cheng, Li Weng, Hongyan Wang, Dongsheng Lu, Qianqian Yao, Yingyu Wang, Johnny Wu, Tobias Wittkop, Malek Faham, Huabang Zhou, Heping Hu, Hai Jin, Zhiqian Hu, Ding Ma, Xiaodong Cheng Clinical relevance of clonal hematopoiesis and its interference in cell-free DNA profiling of patients with gastric cancer Kwang Seob Lee, Choong-Kun Lee, Soon Sung Kwon, Woo Sun Kwon, Sejung Park, Seung-Tae Lee, Jong Rak Choi, Sun Young Rha, Saeam Shin Development and analytical validation of a novel nasopharynx swab-based Epstein-Barr virus C promoter methylation quantitative assay for nasopharyngeal carcinoma detection Zhi-Cong Wu, Ke-Na Lin, Xue-Qi Li, Xin Ye, Hua Chen, Jun Tao, Hang-Ning Zhou, Wen-Jie Chen, Dong-Feng Lin, Shang-Hang Xie, Su-Mei Cao (Pre)analytical considerations concerning the analysis of synovial calprotectin Mohammed F. 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