[British Medical Journal Publishing Group Accepted Oral and Poster Abstract Submissions, The Palliative Care Congress 1 Specialty: 3 Settings – home, hospice, hospital 19–20 March 2020 | Telford International Centre - ()] Poster presentations - 173 Non-invasive technology to support clinical care in palliative head and neck cancer: a systematic review of the use of bioelectrical impedance analysis for body composition assessments