[1] Imam Abdulrahman Bin Faisal Univ, Coll Med, Dept Family & Community Med, Dammam 34224, Saudi Arabia
[2] Imam Abdulrahman Bin Faisal Univ, Coll Med, Dammam, Saudi Arabia
[3] Secur Forces Hosp, Supply Chain Dept, Dammam, Saudi Arabia
[4] Imam Abdulrahman Bin Faisal Univ, King Fahad Hosp Univ, Dept Internal Med, Dammam, Saudi Arabia
[5] King Fahad Specialist Hosp, Palliat Med Dept, Dammam, Saudi Arabia
[6] Imam Abdulrahman Bin Faisal Univ, Coll Med, Dept Family & Community Med, POB 1982, Dammam 34224, Saudi Arabia