3Loh CS,MacRobert AJ,Bedwell J,et al.Oral versus intravenous administration of 5-aminolaevulinic acid for photodynamic therapy[J].Br J Cancer,1993,68(1):41-51.
4Choudry K,Brooke RC,Farrar W,et al.The effect of an iron chelating agent on protoporphyrin IX levels and phototoxicity in topical 5-aminolaevulinic acid photodynamic therapy[J].Br J Dermatol,2003,149(1):124-130.