Both fresh and cryopreserved cultured epithelial allografts were used to treat 20 patients with a total of 30 chronic ulcers. A profound stimulation of host epithelialization from the wound edges and epidermal appendages was observed. Our data suggest that allografts, prepared using a simple cryopreservation technique, retain their morphological and functional characteristics, and are as effective as fresh allografts in healing chronic ulceration.

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which are to be found only in the Southern Hemisphere. The majority of our indigenous nuts (e.g. hazelnut, chestnut, walnut) belong, however, to rose-like plants (Rosidae). Antigen homology is not, however, ruled out.