Gene Testing and Therapy: Our doctors have recently begun extensive research into genetic therapy, particularly regarding the gene type CYP4V2, the most common in our Chinese patients. While this genetic testing is entirely optional, for an additional 1,000 USD, patients receive a blood test to potentially find the specific broken gene that is causing their RP. If we are able to identify which gene is broken, we will keep this in our records and contact the patient in the future if there are any new breakthroughs regarding their specific gene type. This procedure would occur on either day 8 or 9 in the treatment cycle, depending on the patient. Note: Our gene test is only able to determine which gene is broken in around 60% of patients.