[1] Univ Nigeria, Dept Anaesthesia Pain & Palliat Care Unit, Coll Med, Ituku Ozalla Campus, Enugu, Enugu State, Nigeria
[2] Univ Nigeria, Coll Med, EPAC Res Team, Ituku Ozalla Campus, Enugu, Enugu State, Nigeria
[3] Univ Nigeria, Dept Radiat Med, Coll Med, Ituku Ozalla Campus, Enugu, Enugu State, Nigeria
[4] African Palliat Care Assoc, Kampala, Uganda
[5] Nnamdi Azikiwe Univ, Fac Med, Dept Mental Hlth, Awka, Anambra State, Nigeria
[6] Univ Lagos, Coll Med, Dept Obstet & Gynaecol, Oncol & Pathol Studies OPS Unit,Lagos Univ Teachi, Lagos, Nigeria
[7] Bayero Univ, Coll Hlth Sci, Dept Anaesthesia, Aminu Kano Teaching Hosp, Kano, Kano State, Nigeria
[8] Bayero Univ, Dept Community Med, Aminu Kano Teaching Hosp, Kano, Kano State, Nigeria
[9] Nnamdi Azikiwe Univ, Coll Med, Dept Anaesthesia, Awka, Anambra State, Nigeria
[10] Enugu State Univ Sci & Technol, Coll Med, Enugu, Enugu State, Nigeria
[11] InStrat Global Hlth Solut, Abuja, Nigeria
[12] Alex Ekwueme Fed Univ Teaching Hosp, Dept Haematol, Abakaliki, Ebonyi State, Nigeria
[13] Univ Leeds, Acad Unit Palliat Care, Leeds Inst Hlth Sci, Leeds, W Yorkshire, England