Lack of correlation between central venous minus arterial PCO2 to arterial minus central venous O2 content ratio and respiratory quotient in patients with septic shock: A prospective observational study Facundo J. Gutierrez; Mario O. Pozo; Matías Mugno; Sebastián P. Chapela; Natalia Llobera; María J. Reberendo; Gastón E. Murias; Paolo N. Rubatto Birri; Vanina S. Kanoore Edul; Arnaldo Dubin;