1. Wellman Center for PhotomedicineMassachusetts General HospitalBostonMA 02114USA
2. Department of DermatologyHarvard Medical SchoolBostonMA 02115USA
3. Department of Laser Applications in Meteorology, Photochemistry, Photobiology and AgricultureThe National Institute of Laser Enhanced Science, Cairo UniversityCairoEgypt
4. Harvard‐MIT Division of Health Sciences and TechnologyHarvard and Massachusetts Institute of TechnologyCambridgeMA 02139USA