Fig. 5From: Recent advances in transdermal drug delivery systems: a reviewA Diagram illustrating the process of skin tape stripping. B Imaging of a 4-mm volar skin surface area of a healthy forearm with optical coherence tomography (OCT). A Reproduced from [66], copyright permission by Springer Nature 2021. B Reproduced from [74], copyright permission by Frontiers Media 2019Back to article page