The following databases were used for reference purposes: The Cumulative Index of Nursing and Allied Health Literature (CINAHL/Ebsco Host), Pub Med, Google Scholar, books and other articles found when studying journals and research studies.
Við heimildaleit var notast við gagnasöfnin Cumulative Index to Nursing and Allied Health Literature (CINAHL/EBSCO Host), Pub Med, leitarvél Google Scholar, bækur og aðrar greinar sem höfundar fundu við lestur tímarita og rannsókna.