Viewed as a miniature version of the paper.
Provide a brief summary of each of the main sections of the paper.
Not exceed the length specified by the journal, and designed to define what is dealt with in the paper.
Typed as a single paragraph.
SHOULD
state the principal objectives and scope of the investigation
describe the methods employed
state the principal conclusions
Never give any information or conclusion that is not stated in the paper. Not include or refer to tables and figures.