Photodynamic therapy in gastroenterology - Castro e Silva Júnior, Orlando de; Ferreira, Juliana; Kurachi, Cristina; Sabino, L. G.; Sankarankutty, Ajith Kumar; Brunaldi, J. E.; Modena, José Luiz Pimenta; Bagnato, Vanderlei Salvador (International Symposium on Photodynamic Therapy and Photodiagnosis in Clinical Practice, 2008)