Previous studies have used both systemic and topical 5-aminolevulinic acid (ALA)-mediated photodynamic therapy (PDT) to treat oral precancers including oral leukoplakia (OL). oral erythroleukoplakia (OEL). and oral verrucous hyperplasia (OVH) as well as oral cancers including oral verrucous carcinoma (OVC) and oral squamous cell carcinoma (OSCC). Systemic ALA-PDT has been used to trea... https://foldlyers.shop/product-category/sit-stand-desks/