tokens: Currently , the clinical use of 5-aminolaevulinic acid ( ALA ) induced protoporphyrin IX ( PPIX ) for photodynamic therapy ( PDT ) is limited by the maximum tolerated oral ALA dose ( 60 mg / kg ) .
folded_tokens: currently , the clinical use of 5-aminolaevulinic acid ( ALA ) induce protoporphyrin ix ( PPIX ) for photodynamic therapy ( PDT ) be limit by the maximum tolerate oral ALA dose ( 60 mg / kg ) .