Profiling Microbiome Associated Metabolic Pathways in Oesophageal Cancer Survivors

Participants will attend an outpatient clinic, fasted for at least 4 hours for collection of breath.

Participants will attend an outpatient clinic, fasted for at least 4 hours for collection of saliva.

Participants will attend an outpatient clinic, fasted for at least 4 hours for collection of blood.

Participants will attend an outpatient clinic, fasted for at least 4 hours for collection of urine.

Participants will attend an outpatient clinic, fasted for at least 4 hours for collection of stool.

Participants will attend an outpatient clinic and complete validated healthy-related quality-of-life questionnaires.