Adapted from an article by Dr Michael Waugh FRCP FRCPI DHMSA, Regional Sub Dean Yorkshire and Northern Royal Society of Medicine, Emeritus Consultant Venereologist, Leeds General Infirmary, United Kingdom. It was first published in "Community Dermatology", Issue no 5, 2007, by ICTHES World Care, PO Box 4101, Glasgow, UK and included on a CD-ROM (Issue 10 of 2009) distributed by "Teaching-aids At Low Cost", TALC, PO Box 49, St Albans, AL1 5TX, UK. Used by permission.
This edition published in the United Kingdom in 2019 by MissionAssist.