N. Yumita, R. Nishigaki, K. Umemura and S. Umemura, “Synergistic Effect of Ultrasound and Hematoporphyrin on Sarcoma 180,” Japanese Journal of Cancer Research, Vol. 81, No. 3, March 1990, pp. 304-308.
 N. Yumita, R. Nishigaki, K. Umemura and S. Umemura, “Hematoporphyrin as a Sensitizer of Cell-Damaging Effect of Ultrasound,” Japanese Journal of Cancer Research, Vol. 80, No. 3, March 1989, pp. 219-222.
 A. H. Saad and G. M. Hahn, “Ultrasound-Enhanced effects of Adriamycin against Murine Tumors,” Ultrasound in Medicine and Biology, Vol. 18, No. 8, 1992, pp. 715-723. doi:10.1016/0301-5629(92)90122-Q
 G. H. Harrison, E. K. Alcer-Kubiczek and P. L. Gutierrez, “In Vitro Mechanisms of Chemopotentiation by Tone- Burst Ultrasound,” Ultrasound in Medicine and Biology, Vol. 22, No. 3, 1996, pp. 355-362. doi:10.1016/0301-5629(95)02053-5
 Q. Liu, X. Li, L. Xiao, P. Wang, X. Wang and W. Tang, “Sonodynamically Induced Antitumor Effect of Hematoporphyrin on Hepatoma 22,” Ultrasonics Sonochemistry, Vol. 15, No. 6, September 2008, pp. 943-948. doi:10.1016/j.ultsonch.2008.04.001
 T. J. Dougherty, C. J. Gomer, B. W. Henderson, G. Jori, D. Kessel, M. Korbelik, J. Moan and Q. J. Peng, “Photodynamic Therapy,” Journal of the National Cancer Institute, Vol. 90, No. 12, June 1998, pp. 889-905. doi:10.1093/jnci/90.12.889
 L. Ayaru, S. G. Bown and S. P. Pereira, “Photodynamic Therapy for Pancreatic and Biliary Tract Carcinoma,” International Journal of Gastrointestinal Cancer, Vol. 35, No. 1, 2005, pp. 1-13. doi:10.1385/IJGC:35:1:001
 A. M. Richter, S. Cerruti-Sola, E. D. Sternberg, D. Dolphin and J. G. Levy, “Biodistribution of Tritiated Benzoporphyrin Derivative (3H-BPD-MA), a Newpotent Photosensitizer, in Normal and Tumorbearing Mice,” Journal of Photochemistry and Photobiology B, Vol. 5, No. 2, April 1990, pp. 231-244. doi:10.1016/1011-1344(90)80008-L
 D. Huang, K. Okada, K. Comori, E. Itoi and T. Suzuki. “Enhanced Antitumor Activity of Ultrasonic Irradiation in the Presence of New Quinolone Antibiotics in Vitro,” Cancer Science, Vol. 95, No. 10, October 2004, pp. 845-849. doi:10.1111/j.1349-7006.2004.tb02192.x
 J. H. Li, D. Y. Song, Y. G. Xu, Z. Huang and W. Yue, “In Vitro Study of Haematoporphyrin Monomethyl Ether- Mediated Sonodynamic Effects on C6 Glioma Cells,” Neurological Sciences, Vol. 29, No. 4, September 2008, pp. 229-235. doi:10.1007/s10072-008-0972-8
 J. M. Runnels, N. Chen, B. Ortel, D. Kato and T. Hasan, “BPD-MA-Mediated Photosensitization in Vitro and in Vivo: Cellular Adhesion and β1 Integrin Expression in Ovarian Cancer Cells,” British Journal of Cancer, Vol. 80, No. 7, June 1999, pp. 946-953. doi:10.1038/sj.bjc.6690448
 M. van Engleland, L. J. Nieland, F. C. Ramaekers, B. Schutte and C. P. Reutelingsperger, “Annexin V-affinity Assay: A Review on an Apoptosis Detection System Based on Phosphatidylserine Exposure,” Cytometry, Vol. 31, No. 1, January 1998, pp. 1-9. doi:10.1002/(SICI)1097-0320(19980101)31:1<1::AID-CYTO1>3.0.CO;2-R
 Q. Liu, X. Wang, P. Wang, H. Qi, K. Zhang and L. Xiao, “Sonodynamic Effects of Protoporphyrin IX Disodium Salt on Isolated Sarcoma 180 Cells,” Ultrasonics, Vol. 45, No. 1-4, July 2006, pp. 56-60. doi:10.1016/j.ultras.2006.06.063
 L. D. Barnes, E. A, Gluliano, J. Ota, L. A. Cohn and C. P. Moore, “The Effect of Photodynamic Therapy on Squa- mous Cell in a Murine Model: Evaluation of Time Between Intralesional Injection to Laser Irradiation,” The Veterinary Journal, Vol. 180, No. 1, February 2008, pp. 60-65. doi:10.1016/j.tvjl.2007.11.023
 P. Chiarugi and E. Giannoni, “Anoikis: A Necessary Death Program for Anchorage-Dependent Cells,” Biochemical Pharmacology, Vol. 76, No. 11, July 2008, pp. 1352-1364. doi:10.1016/j.bcp.2008.07.023
 G. Melino, R. A. Knight and P. Nicotera, “How Many Ways to Die? How Many Different Models of Cell Death?” Cell Death & Differentiation, Vol. 12, November 2005, pp. 1457-1462. doi:10.1038/sj.cdd.4401781
 S. Umemura, N. Yumita, R. Nishigaki and K. Umemura, “Mechanism of Cell Damage by Ultrasound in Combination with Hematoporphyrin,” Japanese Journal of Cancer Research, Vol. 81, No. 9, September 1990, pp. 962-966.
 N. Yumita, N. Okuyama, K. Sasaki and S. Umemura, “Sonodynamic Therapy on Chemically Induced Mammary Tumor: Pharmacokinetics, Tissue Distribution and Sonodynamically Induced Antitumor Effect of Porfimer Sodium,” Cancer Science, Vol. 95, No. 9, September 2004, pp. 765-769. doi:10.1111/j.1349-7006.2004.tb03259.x
 M. W. Miller, D. L. Miller and A. A. Brayman, “A Review of in Vitro Bioeffects of Inertial Ultrasonic Cavitation from a Mechanistic Perspective,” Ultrasound in Medicine and Biology, Vol. 22, No. 9, 1996, pp. 1131- 1154. doi:10.1016/S0301-5629(96)00089-0
 S. Umemura, N. Yumita and R. Nishigaki, “Enhancement of Ultrasonically Induced Cell Damage by a Gallium- Porphyrin Complex, ATX-70,” Japanese Journal of Cancer Research, Vol. 84, No. 5, May 1993, pp. 582-588.