The U.S. National Library of Medicine (NLM) lists only 19 periodicals in its electronic databases (MEDLINE, PubMed) that are classified as pain journals. Only papers published in journals that are indexed in the databases are accessible through electronic literature searches utilizing those databases. Those 19 journals are listed with their NLM abbreviations and their print and electronic ISSNs.
Keywords: ISSN; MEDLINE; NLM; National Library of Medicine; PubMed; indexes; journals.