- World Health Organization (www.who.int)
- Center for Disease Control and Prevention (www.cdc.gov)
- U.S. Food and Drug Administration (www.fda.gov)
- European Medicines Agency (www.ema.europa.eu)
- PubMed – National Center for Biotechnology (www.ncbi.nlm.nih.gov/pubmed)
- American Academy of Dermatology (www.aad.org/dermatology)
- European Academy of Dermatology and Venereology (www.eadv.org)
- Cyprus Society of Dermatology and Venereology (www.cyderm.org/)