Clinical photodynamic therapy: where is it heading?
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D001471:Barrett Esophagus / Q000188:drug therapy; D002986:Clinical Trials as Topic; D004067:Digestive System Neoplasms / Q000188:drug therapy*; D005544:Forecasting; D006801:Humans; D010166:Palliative Care; D010778:Photochemotherapy / Q000379:methods / Q000639:trends*; D016896:Treatment Outcome