[1] Coimbra Hosp & Univ Ctr, Paediat Dept, Ave Rua Dr Afonso Romao, P-3000602 Coimbra, Portugal
[2] Univ Coimbra, Fac Med, Coimbra, Portugal
[3] Univ Coimbra, Fac Med, Lab Biostat & Med Informat, Coimbra, Portugal
[4] Kings Coll London, Cicely Saunders Inst Palliative Care Policy & Reh, London, England
[5] Coimbra Hosp & Univ Ctr, Paediat Palliat Care Team, Ave Rua Dr Afonso Romao, P-3000602 Coimbra, Portugal