Some publications include links not out to full text but to abstracts, perhaps highlighting presentations at recent conferences or announcing future papers, etc. Currently BrowZine ignores these as "non-articles" but knowing about these could be beneficial to some researchers in the BrowZine environment such as linking to abstracts like this from JCO:

https://ascopubs.org/doi/abs/10.1200/JCO.2019.37.4_suppl.3