Figure 1.

Literature search strategy. A total of 1335 records were found in Embase, 877 in Pubmed, 797 in Scopus and 980 in Web of Science. In total 1607 records were found. Abstracts were screened for eligibility using inclusion and exclusion criteria (see Material and Methods). The full texts of studies included at this stage were then reviewed, and 431 of the reviewed texts were excluded for being a conference abstract (185), a review (145), a perspective article (26), irrelevant for skin diseases or failing to mention TRMs in the skin (39), an editorial comment (7), having no full text available (6), a duplicate (19), books or grey literature (3) and an opinion paper (1). In total, 95 publications from the literature search were included. One additional article was included after screening the references of studies from the search result; and following external review, this produced to a total of 96 articles. TRMs = Tissue-Resident Memory T cells.