[1] Univ Rovira & Virgili, IISPV, Hosp Univ Psiquiatr Inst Pere Mata, Tarragona, Spain
[2] Univ Pontificia Bolivariana, Fac Med, Medellin, Colombia
[3] Inst Neurol Antioquia, Medellin, Colombia
[4] Vanderbilt Univ, Med Ctr, Dept Anesthesiol, Nashville, TN USA
[5] Monroe Carrell Jr Childrens Hosp Vanderbilt, Div Pediat Crit Care, Dept Pediat, Nashville, TN USA
[6] Vanderbilt Univ, Med Ctr, Dept Internal Med, Ctr Hlth Serv Res, Nashville, TN USA
[7] Vanderbilt Univ, Med Ctr, Div Pulm & Crit Care Med, Nashville, TN USA
[8] Tennessee Valley VA Geriatr Res Educ & Clin Ctr, Nashville, TN USA