> This cites no data or studies. The version I have links to many papers, including these: https://www.sciencedirect.com/science/article/abs/pii/S108707920700

> This cites no data or studies. The version I have links to many papers, including these: https://www.sciencedirect.com/science/article/abs/pii/S1087079207000937 https://www.sciencedirect.com/science/article/abs/pii/S10870... https://www.sciencedirect.com/science/article/abs/pii/S1087079201902011 https://www.sciencedirect.com/science/article/abs/pii/S10870... https://www.ingentaconnect.com/content/ben/ctmc/2011/00000011/00000008/art00008 https://www.ingentaconnect.com/content/ben/ctmc/2011/0000001... https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1600-0773.1995.Tb00111.X https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1600-0773.... https://onlinelibrary.wiley.com/doi/full/10.1111/j.1471-4159.2007.05196.x https://onlinelibrary.wiley.com/doi/full/10.1111/j.1471-4159... https://journals.sagepub.com/doi/abs/10.1177/026988119100500205 https://journals.sagepub.com/doi/abs/10.1177/026988119100500... https://pubmed.ncbi.nlm.nih.gov/29514871/#:%7E:text=The%20pharmacokinetics%20of%20caffeine%20are,enzyme%2C%20N%2Dacetyltransferase%202 https://pubmed.ncbi.nlm.nih.gov/29514871/#:%7E:text=The%20ph.... I may misunderstand what you mean by cite. Perhaps it has an academic meaning I'm missing? I'm thinking links may not be sufficient as a citation?