The wounds of participants in control group and study group will be cleansed following to the allocated method until the wounds are completely healed or for six weeks if the wounds have not yet healed. Wound-care specialists and microbiologists will be consulted throughout the study for technical advice, particularly on information not readily available in the literature. Decisions relating to the time period needed to detect wound infection and healing, as well as the investigations required to detect wound infection, are made in consultation with this group.