fig1

Figure 1. Rationale for most superficial dermal implantation of scalp hair follicle. In its natural implantation [(A); schematic view], surface imaging methods only access the uppermost part of the hair follicle (highlighted in yellow). Upper dermal implantation (B) theoretically enables the visualization of the entire follicle. Given the limited depth of focus of non-invasive imaging methods, i.e., 150-250 µm, our experimental study makes sense. More details on the success and failures of the experimental implantation are detailed in Supplementary File 1.