Ai) Paclitaxel treatment promotes mitotic arrest (orange arrows/pH3+ cells) and apoptosis (white arrows/caspase 3+ cells), within the K15+ bulge and K15+ proximal bulb outer root sheath (pbORS) stem/progenitor cell compartments of the human hair follicle (HF). 20 µm scale. Aii) High magnification montage demonstrating mitotic arrest (orange arrow) and apoptosis/caspase 3 positivity (white arrow) within the K15+ bulge. 10 µm scale. pbORS - proximal bulb outer root sheath. 