Arif, T. and Amin, S. S. (2016) “Palmoplantar keratoderma progradiens et transgradiens associated with periodontitis – A case of Papillon-Lefevre syndrome”, Journal of Pakistan Association of Dermatologists, 26(2), pp. 166–170. Available at: https://www.jpad.com.pk/index.php/jpad/article/view/64 (Accessed: 26February2026).