1. Cancer Centre, General Hospital Groeninge, Kortrijk, Belgium;
2. Faculty of Medicine and Health Sciences, Ghent University, Gent, Belgium;
3. Clinical Laboratory, General Hospital Groeninge, Kortrijk, Belgium;
4. Department of Public Health and Primary Care @ Kulak, Catholic University Leuven Kulak, Kortrijk, Belgium;
5. Faculty of Health, Social Care and Education, Anglia Ruskin University, Chelmsford, UK