The PubMed database abbreviates the names of many research journals. Sometimes these abbreviations lend themselves to confusion. Sometimes that confusion can, maybe, be willful. Here’s an example, in a citation of a chemistry study:
Classification of Coffee Beans by GC-C-IRMS, GC-MS, and (1)H-NMR.
J Anal Methods Chem. 2016;2016:8564584
Authors: Arana VA, Medina J, Esseiva P, Pazos D, Wist J
You may wish to track down the full, non-abbreviated citation. The authors are based in Colombia and Switzerland. They say that their goal, in doing the study, is to report new “encouraging steps towards the construction of a robust expert system for the discrimination of coffees from Colombia versus nearby countries (Brazil and Peru).” Here’s further detail: