I am working on annotating part of a bibliography within a larger document and have found the code from the answer on this question to be extremely helpful, but I would like to add a small amount white space before the entries to help separate them from the text of the reference itself. I can't figure out how to do this as I have tried add \vspace{0.2cm} in various parts of the command but everything seems to add a space after the first line of the annotation, but I want one before the annotation. I would have commented on the original post but I lack the reputation to do so. Perhaps the person who posted the original solution (@moewe) will find this and offer some help, but I am open to any solutions.
Thank you all very much in advance.