Looking straight ahead.
D000368:Aged; D054598:Blue Cross Blue Shield Insurance Plans; D002986:Clinical Trials as Topic; D006801:Humans; D008268:Macular Degeneration / Q000191:economics / Q000453:epidemiology / Q000209:etiology / Q000628:therapy; D010778:Photochemotherapy / Q000191:economics; D017319:Photosensitizing Agents / Q000191:economics / Q000627:therapeutic use; D011166:Porphyrins / Q000191:economics / Q000627:therapeutic use; D015593:Retinal Drusen / Q000517:prevention & control; D013673:Technology Assessment, Biomedical; D014481:United States
D017319:Photosensitizing Agents; D011166:Porphyrins