Emcare includes author-written abstracts when they are available. Approximately 60% of the citations in Emcare include abstracts.

Individual words are indexed in the abstracts field. Enter a single word or phrase to be searched in the abstracts.

The Author Email (AE) field contains the email of the author/s. This field is word indexed.

All Fields (AF) is an alias for all of the fields which occur in the source documents, including value-added fields such as Abstract (AB).

The Accession Number (AN) field contains up to ten-digit number assigned in Emcare to uniquely identify a particular record.

The Article Number (AR) consists of a fixed alphanumeric character string used in place of page numbers for electronic documents; it may also be used in addition to page numbers for printed documents. This field, when present, is displayed as part of the Source (SO) field.

The Author (AU) field contains the list of authors associated with the article. The format for authors is last name followed by one or more initials: Smith JC or Smith J. If a single initial could not be transliterated with one letter, two or more letters may be used. Occasionally a name will include the full first name.

Enter the last name, or if it is a common name, enter the last name and first initial. If you are unsure of the spelling of the last name (macdonald or mcdonald), enter one version and then scroll through the list of names to find the other.

Author NameID (AO) field contains author's full name and its Open Researcher and Contributor ID (ORCID) unique identifier that may be supplied by the publisher for records added or updated beginning in early 2015.

The Parent Book Title (BK) field contains the title of the parent book in which the record appears.

The Book Series (BS) field contains information relating to the series title of the document as it appears with the publication. The Book Series field displays in the Source (SO) field.

The Book Title (BT) field contains information relating to the original title and subtitle of the document as it appears with the publication. The Book Title field displays in the Source (SO) field.

The CODEN (CD) field contains a journal CODEN. Journal CODENS are 5-digit codes such as "AJDCA" which uniquely identify a journal title.

The Conference Information (CF) field contains supplementary information about a conference event such as date and its location, and/or conference publication containing information about the conference proceeding that publishes the conference presentations. Conference information usually is displayed as part of the Source (SO).

Individual words are indexed in the CF field; enter a single descriptive word such as "japan".

The Conference Publication (CG) field contains information about the conference proceeding that publishes the conference presentations. Conference publication is displayed as part of the Source (SO).

The Clinical Trial Number (CN) field contains the clinical trial number associated with the record. CTNs that follow the NIH format "nct12345678" are hyperlinked.

The Country of Publication (CP) field contains the full name of the country in which a journal was published (such as United States).

The country name is entered into the index as a phrase.

The Copyright (CR) field contains the copyright information associated with an article.

The Collaboration (CO) field contains the names of collaborators associated with the article.

The Contributors (CZ) field contains the name and e-mail address of a contributor to the document (e.g. an author, editor, illustrator etc.)

The Date Created (DC) field contains the date on which the original Citation & Abstract file is made in Emcare by Elsevier.

The Date Delivered (DD) field contains the date that the record was issued on Emcare by Elsevier.

The Candidate Terms (DJ) field contains new concepts not in Emtree, and were proposed during indexing because they were judged to be useful additions to Emtree. Candidate Terms are also indexed in the Subject Headings (SH) field.

The Device Manufacturer (DM) field contains the full name of the manufacturer of a drug or device discussed in an article. Manufacturer names are listed in their brief form, for example, Lilly for "Eli Lilly."

View the index to see all Device Manufacturer names. See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

The Device Manufacturer (DM) field will display together with the Device Trade Name (DV) field in the citation.

The DOI (DO) field contains the Digital Object Identifier - a unique and persistent digital identification code for any object of intellectual property. The DOI itself consists of two parts: a prefix which is assigned to each publisher by the administrative DOI agency, e.g., "10.3961", and a suffix which is assigned by the publisher and can be any code that the publisher chooses, e.g., "jpmph.2009.42.4.209". The full DOI appears as such: "10.3961/jpmph.2009.42.4.209".

You can search the DO field by entering either the prefix in quotes ("10.3961".do.) or the entire DOI value in quotes ("10.3961/jpmph.2009.42.4.209".do.).

The Date of Publication (DP) field consists of the date of publication for a citation. This field is usually displayed as part of the Source (SO) field.

It is searchable either structured in the format of DD MMM YYYY (Example: 23 FEB 2002) or unstructured (Example: Winter 2009 or apr 2009).

The Candidate Term Word (DQ) is a word indexed version of Candidate Terms (DJ) in which the ADJ (adjacency) function can be utilized.

The Drug Index Terms (DU) field contains index terms used for all drugs and chemicals: not only therapeutic drugs, but also endogenous compounds, laboratory chemicals and environmental chemicals or toxins.

It is important to realise that "drugs" as defined in Emcare may refer to any chemical entity.

The Device Trade Name (DV) field contains the medical device trade names assigned to the records.

View the index to see all Device Trade Names. See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

The Device Trade Name (DV) displays with the Device Manufacturer (DM) field in the citation.

The Drug Index Terms Word (DY) is a word indexed version of Drug Index Terms (DU) in which the ADJ (adjacency) function can be utilized.

The Editor (ED) field contains the list of editors associated with the article.

The format for editor is last name followed by one or more initials: Smith JC or Smith J. If a single initial could not be transliterated with one letter, two or more letters may be used. Occasionally a name will include the full first name. The Editor field is phrase indexed.

Enter the last name, or if it is a common name, enter the last name and first initial.

The Entry Week (EM) field contains the year and week number in which a document was added to Emcare on Ovid. The Entry Week appears in the format YYYY00.

The Entry Week (EM) field is phrase indexed.

The Electronic ISSN (EN) field contains the electronic International Standard Serial Number (eISSN) for the journal in which the article was published.

Each journal may have an ISSN, an eISSN, or both. When there is only an eISSN available it is also searchable in the ISSN (IS) index and displays in both the ISSN (IS) and Electronic ISSN (EN) fields.

Like the ISSN, it appears as an 8-digit character, separated by a hyphen: 1089-4098.

The Enzyme Commission Numbers (EZ) field contains the enzyme name with corresponding Enzyme Commission number.

Enzyme Commission Numbers appear and are searched with dot enclosed in double quotes ("3.4.22.32").

The Floating Subheadings (FS) field contains both the 2-letter link terms, such as "an" and the full headings, such as "drug analysis". These are displayed following the corresponding EMTREE Subject Headings.

Sometimes you may wish to retrieve every Floating Subheading that includes a particular word; this is done by searching the single word in the Floating Subheading Word (FX) field

The Grant Abstract (GA) field contains the acknowledgement full text of the full text article. This field is related to the Grant Number (NO) field.

The Grant Abstract (GA) field is word indexed.

The Grant Country (GC) field contains the country of the organization that has awarded the grant.

This field displays as part of the Grant Information (GI) field.

The Grant Information (GI) field displays information about awarded grants, may contain Grant Number (NO), Grant Acronym (GR), Grant Organization (GO), Grant Organization Number (GN) and Grant Country (GC).

The Grant Organization Number (GN) field contains the identification number of the agency that has awarded the grant.

This field displays as part of the Grant Information (GI) field.

The Grant Organization (GO) field contains the full name of the organization that has awarded the grant.

This field displays as part of the Grant Information (GI) field.

The Grant Acronym (GR) field contains the acronym of an organization that has awarded the grant.

This field displays as part of the Grant Information (GI) field.

Sometimes you may wish to retrieve every EMTREE subject heading that includes a particular word; this is done by searching the single word in the Heading Word (HW) field.

The ISBN (IB) field contains the International Standard Book Number (ISBN) for a book or monographic publication.

The ISBN (IB) field appears as a 10-digit number and may contain 13-digit number if available.

The Institution (IN) field contains the primary author's affiliation, which is usually the source for a reprint of the article.

This information is not standardized and often contains abbreviations. Enter the single most descriptive word in an institution (harvard, not university). Consider both full spellings and abbreviations.

The Issue Part field (IP) contains the Issue and/or part for a particular volume of a journal. The IP field usually displays as part of the Source (SO) field.

The ISSN (IS) field contains the International Standard Serial Number (ISSN) for the journal in which an article was published.

Each journal may have an ISSN, an eISSN, or both. When there is only an eISSN available it is also searchable in the ISSN (IS) index and displays in both the ISSN (IS) and Electronic ISSN (EN) fields.

It appears as an 8-digit character, separated by a hyphen: 0002-8894.

The Journal Abbreviation (JA) field contains the abbreviated title of an individual journal issue.

The Journal Issue (JI) field contains the title of an individual journal issue.

The Journal Name (JN) field contains the full name of the journal in which an article was published.

View the index to see all journal names. See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

This field displays as part of the Source (SO) field.

The Journal Word (JX) field contains individual words from every journal name in Emcare.

The Keyword Heading Word (KF) index allows you to retrieve every Keyword Headings defined by the author of the article. Do this by searching a single word in the Keyword Heading Word (KF) field.

The Keyword Heading (KW) field contains keywords defined by the author of the article. To retrieve every Keyword Heading that includes a particular word, search for the word in the Keyword Heading Word (KF) index.

The Language (LG) field contains the language(s) of publication of an article. The language name will appear as the full language name.

For a spelled-out list of languages, refer to the Languages Limit menu or view the index. See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

The Local Messages (LM) field contains messages created by the System Administrator to indicate information about journals held in your local library system.

The Drug Manufacturer (MF) field contains the full name of the manufacturer of a drug or device discussed in an article. Manufacturer names are listed in their brief form, for example, Lilly for "Eli Lilly."

View the index to see all Drug Manufacturer names. See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

The Drug Manufacturer (MF) field will display together with the Drug Trade Name (TN) field in the citation.

The Molecular Sequence Number (MS) field contains an acronym for a source of molecular sequence data (for example, Genbank) and a sequence accession number documented by the source.

The Device Index Terms (MV) field contains index terms used for general and medical devices. Emtree contains over 3,000 specific device terms (e.g., endoscopes, catheters, prostheses).

The Device Index Terms Word (MY) is a word indexed version of Device Index Terms (MV) in which the ADJ (adjacency) function can be utilized.

The Grant Number (NO) field contains the original identification number of the grant that is awarded to the work as described in the content. The identification number is assigned by the grant agency.

This field displays as part of the Grant Information (GI) field.

The Number of References (NR) field contains the number of references that appear at the end of the document.

The Other Index Terms (OD) field contains Emtree terms that are from all 13 Emtree facets other than "chemicals and drugs".

They are distinguished from drug terms in that the latter are indexed in greater depth.

The Original Title (OT) field contains all non-English titles in the original language. If the original title was in a non-Roman alphabet, then the OT is transliterated.

Omit common articles when searching a foreign language: heure not l'heure.

The Other Index Terms Word (OX) is a word indexed version of Other Index Terms (OD) in which the ADJ (adjacency) function can be utilized.

The Part Number field (PA) contains the part number for a particular journal. The PA field usually displays as part of the Source (SO) field.

The Publisher (PB) field contains the name and optionally the address of the publisher for Journal, Book, Conference Proceeding, Report, Major Reference Work, Book Series or Trade Journal.

Enter the most distinctive part of a name to locate a publisher, for example: "elsevier".

The Publisher Copyright (PC) index contains publisher information and it will display at the end of the Abstract (AB) field if available.

The Publisher Copyright (PC) is word indexed.

The first page on which an article appears is indexed in the Page (PG) field. Often a journal title combined with the beginning page number is enough to locate a citation. This field displays as part of the Source (SO) field.

The Preferred Journal Name (PJ) field contains the preferred name of the journal in which an article was published.

This field displays as part of the Source (SO) field, but will only be displayed if the Journal Name (JN) is not available.

The PMID (PM) field contains PubMed unique identifier assigned to each PubMed record.

The Revised Date (RD) field contains the date that the record was revised by Elsevier.

The CAS Registry Numbers (RN) field contains the Chemical Abstracts Service Registry number in an association with chemical name for a compound mentioned in an article.

CAS Registry Numbers (RN) field are indexed by numbers and/or chemical names. Numbers appear and are searched with hyphens (e.g.50-07-0) and chemical names should be entered as phrase as they appear in the CAS Registry Number display (e.g. squalene monooxygenase).

The Subject Heading (SH) field contains the EMTREE Thesaurus terms used by Emcare indexers to describe the content of an article.

EMTREE terms are organized in hierarchy.

EMTREE terms are entered into the index as phrases and should be searched as they appear in the published EMTREE or in our Thesaurus display. All EMTREE terms and associated terms are indexed in the SH field.

The Summary Language (SL) field contains the language or languages in which the abstract is written.

The summary language name appears in the index as the full language name (french). See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

The Source (SO) field includes a display of all basic information needed to locate a citation, may contain the Journal Name, Book Title, Book Series, Conference Information, Part Number, Vol/Issue, Pagination, Year of Publication, Article Number and Date of Publication.

The Source Type (SU) field contains information about the source type of the document.

The Title (TI) field contains the English language version of a title. For documents which are not written in English, the original or transliterated title appears in a separate field, Original Title (OT).

The Journal Translated Name (TJ) field contains the translated title of an individual journal issue.

The Drug Trade Name (TN) field contains the trade name for a drug or device discussed in an article.

View the index to see all Drug Trade Names. See "Display and Browse Field Indexes" in the Ovid Online Help for details on viewing and using a field index.

The Drug Trade Name (TN) displays with the Drug Manufacturer (MF) field in the citation.

The Textword (TW) field is an alias for all of the fields in a database which contain text words and which are appropriate for a subject search.

The Textword field in Emcare includes Title (TI), Abstract (AB), and Drug Trade Name (TN).

The URL (UR) field will contain the URL information for internet only journals.

The Volume (VO) field consists of the volume of a serial publication. This field is usually displayed as part of the Source (SO) field.

The arXiv Identifier (XC) Field contains research articles unique identifier in "arXiv archive" (an electronic archive and distribution server for research articles that is maintained and operated by Cornell University Library). The areas covered by arXiv include physics, mathematics, computer science, nonlinear sciences, quantitative biology and statistics.

This identifier will be supplied by the publisher for records added or updated in the last quarter of 2016 – present (e.g. http://arxiv.org/abs/1508.00332v5).

There are 2 formats of ArXiv Identifier, please see this link for further details - https://arxiv.org/help/arxiv_identifier.

The Year of Publication (YR) field contains the year in which an article or monograph was published. The full year appears in the document and can be searched using a single 4-digit number.

Year of Publication (YR) field also displays as part of the Source (SO) field.

A limit to Experimental Subjects will restrict retrieval to various specific animal types used as experimental subjects.