Here’s a breakdown of the references provided, formatted for easier readability:
69. Souza, A.L., & Patti, G.J. (2021). A protocol for untargeted metabolomic analysis: from sample preparation to data processing. Methods Mol. Biol. 2276,357-382.
* DOI: 10.1007/978-1-0716-1266-8_27
* PubMed: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Abstract&list_uids=34060055
* PubMed Central: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9284939
70. Cajka, T. et al. (2023). Optimization of mobile phase modifiers for fast LC–MS-based untargeted metabolomics and lipidomics. Int. J. Mol. Sci. 24,1987.
* DOI: 10.3390/ijms24031987
* PubMed: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Abstract&list_uids=36768308
* PubMed Central: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9916776
71.Danlos, F.-X. et al. (2021). Metabolomic analyses of COVID-19 patients unravel stage-dependent and prognostic biomarkers. Cell Death Dis. 12, 258.
* DOI: 10.1038/s41419-021-03540-y
* pubmed: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Abstract&list_uids=33707411
* PubMed Central: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7948172