Fig. 1From: Protocol for two-arm pragmatic cluster randomized hybrid implementation-effectiveness trial comparing two education strategies for improving the uptake of noninvasive ventilation in patients with severe COPD exacerbationClinician roles in management of patients with severe COPD in need for ventilation. Key: ED = Emergency Department, MD = Physician, RT = Respiratory Therapist, NIV = Noninvasive Ventilation, IMV = Invasive Ventilation, RT = Respiratory TherapistBack to article page