affect people over the age of 60. The incidence is 0.78% of the population and the prevalence ranges from 0.18 to 0.32%. As the population ages, the number of chronic wounds is expected to rise. Ulcers that heal within 12 weeks are usually classified as acute, and longer-lasting ones as chronic. References Further reading External links Maggot Therapy Project web site at the University of California, Irvine, list of maggot therapy practitioners BioTherapeutics Education and Research Foundation Accredited, interactive wound care education offered at no cost Awareness campaign website by the Australian Wound Management Association Website of the European Wound Management Association (EWMA) Skin conditions resulting from physical factors Necrosis