[This working paper is a translation of an article published in French in the peer-reviewed journal: I2D - Information, données & documents 2023 (1)114-25. https://doi.org/10.3917/i2d.231.0114] Librarians play a crucial role in both the quantitative and qualitative aspects of health care research, given the establishment of a trusting relationship between them and the physicians leading clinical research. Well-executed systematic reviews contribute significantly to the practice of evidence-based medicine. This feedback presents a collaborative perspective involving a librarian and two clinicians regarding their joint efforts in completing eight systematic reviews. It delineates the assistance offered by the librarian and exemplifies how the clinicians' attitudes impact the service quality and, consequently, the credibility of these works.