Ann Saudi Med 2019 Jan-Feb;39(1):56-60
Dr. Muzamil Amin Chisti, MBC 46 Department of Dermatology,, King Faisal Specialist Hospital and Research Centre,, PO Box 3354, Riyadh 11211, Saudi Arabia, T: +966114424608, ORCID: http:// orcid.org/0000-0002-6877-2715.