PMID (PubMed ID) is the unique identifier for a publication's abstract in PubMed.
PMCID (PubMed Central ID) is the unique identifier for a free complete article (once it is publicly available) in PubMed Central.
PubMed and PubMed Central, produced by the U.S. National Library of Medicine, are text archives of biomedical and life sciences literature.
A DOI (Digital Object Identifier) is a publisher’s unique identifier for a publication. The prefix http://dx.doi.org/ is presumed. Publishers may charge for access.
Kury F, Baik SH, McDonald CJ.Analysis of Healthcare Cost and Utilization in the First Two Years of the Medicare Shared Savings Program Using Big Data from the CMS Enclave. AMIA Annu Symp Proc. 2017 Feb 10;2016:724-733. eCollection 2016.
Sneiderman C, Fontelo P, Ackerman MJ.XO Computer Application to Medical Science Education. J International Assoc of Medical Science Educators: Special Issue Poster Abstracts of the 12th IAMSE Annual Meeting (2008 Jul 25-29; Salt Lake City);18(supplement 2):100.
Locatis C, Fontelo P, Ackerman MJ, Sneiderman C.Feasibility Studies in IP Videoconferencing, Streaming, and Wireless Communication. AMIA Annu Symp Proc [Proceedings of the American Medical Informatics Association Annual Symposium]; 2002 Nov 9-13; San Antonio, Texas. p. 1090.