“…SLADDEN Department of Dermatology, University of Tasmania, Launceston, Tasmania, Australia E-mail: m.sladden@doctors.org.uk DOI: 10.1111/bjd.13045 DEAR EDITOR, We were very pleased to see the correspondence from Dr Mike Sladden 1 regarding the Critically Appraised Topic (CAT) that we published in the BJD recently. 2 We agree that it is a very helpful CAT, addressing a question that is commonly encountered in dermatological practice. The inclusion of the patient's perspective is a good way of keeping the CAT grounded in the principles of shared decision making (although it is not a mandatory part of a CAT as such).…”