Table 2.

Selection criteria

	Inclusion	Exclusion
Population	Undergraduate medical students	Graduate and postgraduate medical students, junior doctors, physicians
Intervention	Description of group-based mentorship programs in undergraduate medical education focusing on professional development Evaluation of the mentorship program, either by mentors or mentees or both	One-on-one mentorship Mentorship programs inadequately described, i.e. lacking details on structure, objectives and/or evaluation Programs aimed at recruiting students to particular specialties or field of interests Programs aimed at medical students who need academic supervision or remediation Programs aimed at under-represented minority medical students
Comparison	Comparison of group-based mentorship programs
Outcome	Outcomes of mentorship programs on the mentor or mentee Evaluation forms and surveys
Study design	Peer-reviewed papers	Reviews Conference presentations Commentaries Letters Editorials