Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0003-2670(08)00947-1
Caffeine free resource MedlinePlus Health Information https://medlineplus.gov/caffeine.html
Full text from free resource Okayama University Scientific Achievement Repository http://ousar.lib.okayama-u.ac.jp/33027
free resource NCI CPTAC Assay Portal https://assays.cancer.gov/CPTAC-317