Fig. 1From: The predictive value of respiratory function tests for non-invasive ventilation in amyotrophic lateral sclerosisFlowchart of the patients. The dotted box indicates the patients included for analyses. *21 patients who did not yet receive a referral to an Home Ventilation Services (HVS) or died before. NIV: Non-invasive ventilation (successfully accepted (n = 77) use >48 h), ALS: Amyotrophic Lateral Sclerosis, PMA: Progressive Muscular AtrophyBack to article page