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Table 3 Examples of equivalence classes of pre-defined sub-headings in structured abstracts.

From: Are decision trees a feasible knowledge representation to guide extraction of critical information from randomized controlled trial reports?

Class

Example Heading Names

Aim

Goal, Aim of the study, Purpose

Setting

Setting, Study setting, Settings and Location

Participants

Study population, Type of participants, Patients or participants, Sample

Outcome measure

Measurements, Primary outcome measure, Study endpoints, Major outcome measures