[1] King Saud bin Abdulaziz Univ Hlth Sci, King Abdulaziz Med City, Dept Intens Care, POB 22490, Riyadh 1425, Saudi Arabia
[2] King Saud bin Abdulaziz Univ Hlth Sci, King Abdulaziz Med City, Coll Med, POB 22490, Riyadh 1425, Saudi Arabia
[3] King Abdullah Int Med Res Ctr, Riyadh, Saudi Arabia
[4] King Abdul Aziz Med City, Dept Anaesthesia, Riyadh, Saudi Arabia
[5] King Abdul Aziz Med City, Dept Intens Care, Riyadh, Saudi Arabia
[6] King Abdul Aziz Med City, Qual Management Dept, Riyadh, Saudi Arabia
[7] King Abdul Aziz Med City, Infect Prevent & Control Program, Riyadh, Saudi Arabia
[8] King Saud bin Abdulaziz Univ Hlth Sci, King Abdulaziz Med City, Coll Med, Epidemiol & Biostat, Riyadh, Saudi Arabia
[9] King Saud bin Abdulaziz Univ Hlth Sci, King Abdulaziz Med City, Resp Serv, Riyadh, Saudi Arabia