1. Behavioural Sciences Unit Kids Cancer Centre Sydney Children's Hospital Randwick New South Wales Australia
2. Discipline of Pediatrics School of Women's and Children's Health UNSW Medicine UNSW Sydney Sydney New South Wales Australia
3. Psychophysiology and Clinical Psychology Department Southern Federal University Rostov‐on‐Don Rostov Oblast Russia
4. Centre for Pediatric Oncology and Hematology Children's District Hospital Rostov‐on‐Don Rostov Oblast Russia