While the review process is confidential, we understand that in some cases reviewers might want to collaborate with trainees in the evaluation of manuscripts. We encourage this practice and we only ask that you limit the collaborative assessment to no more than one trainee at a time. You can add the junior colleague with whom to collaborate in the reviewer by using the "Add Collaborator" link at the top of this report. As the person originally invited to review the manuscript, you are ultimately responsible for ensuring the confidential handling of the manuscript and for the content of the report.