<qa>  What is the protocol for outside physician participation strictly adhered to?1. Patients who are unable or unlikely to be able to adhere to the treatment plan or to return to Houston for follow-up visits because of geographical, economic, emotional, or social considerations are not eligible for this study. Note: some follow-up care may be provided by outside physicians as long as the MD Anderson Cancer Center MDACC protocol for outside physician participation is strictly adhered to. 