NCT00155584.

Study name	Topical 5‐Aminolevulinic Acid Photodynamic Therapy for the Treatment of Verruca Vulgaris: Comparison of Red and Green Light‐Emitting Diode Array
Methods	This is using a random‐sample observational model: natural history Time perspective: longitudinal Time perspective: prospective
Participants	Inclusion criteria of the trial 10 to 80 years of age with warts
Interventions	ALA‐PDT and red versus green LED light source A topical ALA formulation and LED array will be specifically designed and developed for the skin lesions.
Outcomes	Outcomes of the trial The efficacy of the ALA formulation designed for wart treatment will be evaluated with in vivo fluorescence imaging system The therapeutic efficacy of ALA‐PDT will be evaluated by using a LED array designed for skin irradiation The unwanted side‐effects of pain and burning will be further compared between red and green LED array
Starting date	December 1994
Contact information	National Taiwan University Hospital Taipei Taiwan Contact: Hsiung‐Fei Chien, MD, PhD Tel: 886223123456 ext.: 5594 hfchien@ha.mc.ntu.edu.tw Investigator: Chin‐Tin Chen, PhD, Sub‐Investigator Investigator: Hisung‐Fei Chien, MD, PhD, Principal Investigator
Notes	This trial is apparently recruiting, but its status has not been verified recently.