The effort researchers put into peer review is for the most part not 
          compensated. Researchers may receive reimbursement for travel and per 
          diem when they attend special grant-review sessions and occasionally 
          are paid a basic daily stipend, but this seldom covers the true cost 
          of reviewing a manuscript or a stack of grant applications. As uncompensated 
          effort, the time researchers devote to peer review can easily take second 
          place to other obligations. Running a crucial experiment or submitting 
          a grant application on time understandably is more important than reviewing 
          someone else’s work.
          However pressed you are for time, if you agree to do a review, you should 
          find the time to meet your obligation in a timely manner. Research is 
          competitive. Researchers are rewarded for discoveries. They should not 
          lose their priority for a discovery due to the tardiness of a reviewer 
          sending comments on a manuscript. Research is also useful. The announcement 
          of discoveries that can benefit the public should not be delayed because 
          someone who agreed to review a manuscript does not have the time to 
          do the review.
          Editors, program managers, and others who rely on peer review to make 
          decisions generally provide a deadline for getting the review done when 
          they first contact reviewers. Anyone who agrees to take on a peer review 
          assignment under these conditions should meet the proposed deadline. 
          If the time frame is not reasonable, either decline to do the review 
          or ask for more time in advance. Do not delay someone else’s work 
          just because you are short on time.