5 MEDICAL DEVICES AND TESTING PRODUCTS, NAMELY KITS, CONSISTING PRINCIPALLY OF HUMAN SKIN SUBSTRATES, MEDIA AND OTHER REAGENTS FOR TESTING THE EFFECT OF VARIOUS CHEMICALS AND COMPOUNDS; BONE MARROW, SKIN, LIVER, CARTILAGE, HEART VALVE TISSUE, BLOOD VESSELS AND OTHER ORGAN TISSUE CULTURES FOR REPAIR AND REPLACEMENT; LIVING DERMAL REPLACEMENT TISSUE; LIVING DERMAL REPLACEMENT TISSUE COMBINED WITH A TEMPORARY SYNTHETIC EPIDERMAL LAYER