Supplementary Figure. TikTok Duetting Feature for Dermatologists

Frame A: The interface while watching a video on TikTok. For a TikTok user to duet a video, they click the arrow in the bottom right-hand corner of the screen, referred to as the "share" button. Frame B: Click the second option at the bottom of the screen titled "duet". Frame C: The TikTok user will then be prompted to a screen showing the original video alongside the user's camera view. To begin recording, click on the red circle "record button" at the bottom of the screen. When finished recording release finger from the record button. The user will then confirm their duet post. Frame D: The final product of a duet. Within this example, Dr. Muneeb Shah, DO, dermatology resident physician, duets a viral video pertaining to hidradenitis suppurativa. His duet explains the diagnosis and appropriate treatment plan.帧A：TikTok平台观看视频时的界面。TikTok用户若需对视频进行合拍（Duet），需点击屏幕右下角的箭头按钮，该按钮被称为"分享"按钮。 帧B：点击屏幕底部第二个标题为"duet（合拍）"的选项。 帧C：随后TikTok用户将跳转至同时展示原视频与用户本人摄像头画面的界面。点击屏幕底部的红色圆形"录制按钮"即可开始录制，录制完成后松开按在录制按钮上的手指，随后用户即可确认并发布该合拍视频。 帧D：合拍视频的最终成品。本示例中，骨病医学博士、皮肤科住院医师穆尼布·沙阿（Dr. Muneeb Shah, DO）对一条关于化脓性汗腺炎（hidradenitis suppurativa）的爆火视频进行了合拍，其合拍视频讲解了该病症的诊断与合理治疗方案。