1. Division of Clinical Cancer Epidemiology, Department of Oncology; Sahlgrenska University Hospital; Gothenburg Sweden
2. Department of Social Work; University of Gothenburg; Gothenburg Sweden
3. Division of Clinical Cancer Epidemiology, Department of Oncology and Pathology; Karolinska Institutet; Stockholm Sweden
4. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
5. Children's Cancer Hospital Egypt; Cairo Egypt
6. Prince Sultan Military Medical City; Riyadh Kingdom of Saudi Arabia
7. National Cancer Institute; Cairo University; Cairo Egypt
8. Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
9. Sophiahemmet University; Stockholm Sweden
10. Department of Nursing; Ersta Sköndal University College; Stockholm Sweden