[1] Hosp Naval Almirante Nef, Radiol Dept, Subida Alessandri S-N, Vina Del Mar, Chile
[2] Hosp Dr Eduardo Pereira, Radiol Dept, Enrique Ibsen S-N, Valparaiso, Chile
[3] Hosp Naval Almirante Nef, Intens Care Unit, Subida Alessandri S-N, Vina Del Mar, Chile
[4] Hosp San Martin Quillota, Intens Care Unit, La Concepcion 1050, Quillota, Chile
[5] Hosp IESS Los Ceibos, Intens Care Unit, Av El Bombero Km 6-5, Guayaquil, Ecuador
[6] Ctr Diagnost Dr Enrique Rossi, Radiol Dept, RA-2777 Buenos Aires, DF, Argentina
[7] Clin Bupa Santiago, Radiol Dept, Av Dept 1455, Santiago, Region Metropol, Chile