What is the low dose immunotherapy pilot study's findings for head and neck cancer patients

I'm sorry, but I couldn't find specific information about a low dose immunotherapy pilot study for head and neck cancer patients. It's possible that the study you are referring to has not been widely published or is still ongoing. Immunotherapy is a rapidly advancing field, and numerous studies are conducted to investigate its efficacy and potential benefits for different types of cancer. To obtain accurate and up-to-date information on low dose immunotherapy for head and neck cancer, I recommend consulting with a medical professional or conducting a thorough literature search on reputable medical websites and journals.