Patients, centers : 4 groups of 14 patients presenting chronic respiratory disease followed in the ICU of RAYMOND POINCARE HOSPITAL in GARCHES and in the pulmonary departments of the Armand Trousseau hospital and the PITIE SALPETRIERE IN PARIS; 1 cohort of 12 patients admitted in the ICU of Henri Mondor in CRETEIL IN PARIS for acute respiratory failure.