[1] McMaster Univ Univ, Dept Med, Hamilton, ON, Canada
[2] Alberta Hlth Serv, Dept Crit Care Med, Calgary, AB, Canada
[3] Univ Calgary, Calgary, AB, Canada
[4] Univ Calgary, Dept Med, Div Respirol, Calgary, AB, Canada
[5] King Faisal Specialist Hosp & Res Ctr, Crit Care Med Dept, Riyadh, Saudi Arabia
[6] Imam Abdulrahman Bin Faisal Univ, Dept Emergency & Crit Care, Dammam, Saudi Arabia
[7] Al Amiri Hosp, Dept Anesthesia Crit Care Med & Pain Med, Kuwait, Kuwait
[8] Jaber Al Ahmad Al Sabah Hosp, Dept Anesthesia Crit Care Med & Pain Med, Kuwait, Kuwait
[9] Univ Texas Hlth, McGovern Med Sch, Dept Internal Med, Div Crit Care, Houston, TX USA
[10] Univ Texas Hlth, McGovern Med Sch, Div Pulm, Houston, TX USA
[11] Univ Texas Hlth, McGovern Med Sch, Div Sleep Med, Houston, TX USA
[12] Univ Toronto, Interdept Div Crit Care, Toronto, ON, Canada
[13] King Saud Bin Abdulaziz Univ Hlth, Dept Intens Care, Coll Med, Jeddah, Saudi Arabia
[14] Minist Natl Guard Hlth Affairs, Intens Care Dept, Al Hasa, Saudi Arabia
[15] Univ Laval, Dept Anesthesiol & Crit Care, Div Crit Care, Quebec City, PQ, Canada
[16] McMaster Univ, Dept Anesthesia, Hamilton, ON, Canada
[17] Res Inst St Josephs Healthcare Hamilton, Hamilton, ON, Canada
[18] King Saud Bin Abdulaziz Univ Hlth Sci, Coll Med, Riyadh, Saudi Arabia
[19] Univ Calgary, Dept Crit Care, Calgary, AB, Canada
[20] Univ Calgary, Dept Community Hlth Sci, Calgary, AB, Canada
[21] Univ Calgary, OBrien Inst Publ Hlth, Calgary, AB, Canada
[22] Minist Natl Guard Hlth Affairs, King Abdulaziz Med City, Intens Care Dept, Riyadh, Saudi Arabia
[23] Alberta Hlth Serv, Dept Med, Div Respirol, Dept Crit Care Med, Calgary, AB, Canada
[24] Copenhagen Univ Hosp, Dept Intens Care, Rigshosp, Copenhagen, Denmark
[25] McMaster Univ, Dept Med, Hamilton, ON, Canada
[26] McMaster Univ, Populat Hlth Res Inst, Hamilton, ON, Canada
[27] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[28] Amer Univ Beirut, Dept Emergency Med, Beirut, Lebanon