[1] Ist Ric Farmacolog Mario Negri IRCCS, Dept Publ Hlth, Lab Clin Epidemiol, Ranica, Bergamo, Italy
[2] Maggiore Hosp, Anesthesia Intens Care & Prehosp Emergency, Bologna, Italy
[3] Univ Washington, Dept Neurol Surg, Seattle, WA USA
[4] Univ Washington, Sch Global Hlth, Seattle, WA USA
[5] Grande Osped Metropolitano Niguarda, Neurointens Care Unit, Milan, Italy
[6] Hungarian Army Med Ctr, Budapest, Hungary
[7] Univ Med Ctr Ljubljana, Clin Dept Anaesthesiol & Intens Therapy, Ljubljana, Slovenia
[8] Univ Ljubljana, Fac Med, Ljubljana, Slovenia
[9] Gen Hosp Novo Mesto, Novo Mesto, Slovenia
[10] Univ Nicosia, Med Sch, Nicosia, Cyprus
[11] Univ Hosp Bristol & Weston NHS Fdn Trust, Bristol, England
[12] Bengurion Univ Negev, Soroka Med Ctr, Pediat Intens Care Unit, Beer Sheva, Israel
[13] Bengurion Univ Negev, Fac Hlth Sci, Beer Sheva, Israel
[14] Ohio State Univ, Coll Publ Hlth, Div Biostat, Columbus, OH USA
[15] Med Univ Warsaw, Clin Anaesthes & Intens Care, Warsaw, Poland
[16] Maurizio Bufalini Hosp, Hosp Nursing Management, AUSL Romagna, Cesena, Italy
[17] Univ Washington, Dept Neurol Surg, Seattle, WA USA
[18] Univ Washington, Dept Biostat, Seattle, WA USA
[19] Univ Hosp Heraklion, Iraklion, Greece
[20] Ist Ric Farmacolog Mario Negri IRCCS, Dept Publ Hlth, Lab Clin Epidemiol, Villa Camozzi,Via GB Camozzi 3, I-24020 Ranica, Italy