P259 Preference of Patients with Obstructive Sleep Apnoea Syndrome (OSAS) For Conventional Continuous Positive Airway Pressure(CPAP) or Bi-Level CPAP (CFlex) and Changes in Resistance to Expiration
P259 Preference of Patients with Obstructive Sleep Apnoea Syndrome (OSAS) For Conventional Continuous Positive Airway Pressure(CPAP) or Bi-Level CPAP (CFlex) and Changes in Resistance to Expiration