Peer review is an integral part of scholarly publication. Hence, peer reviewers are held in high regard as they improve the quality of science that reaches publication and weed out questionable research. With the volume of publishing increasing each year, peer reviewers find themselves with multiple requests to review manuscripts. Peer reviewing is a voluntary service that researchers agree to undertake in their spare time and is usually unpaid. As a result, journal editors are finding it increasingly difficult to appoint reviewers as many do not want to accept review requests.