- ALS (Lou Gehrig's)
- Chronic Critical Illness
- COPD - Chronic Obstructive Pulmonary Disease
- Guillain-Barre Syndrome
- MS - Multiple Sclerosis
- Obesity-related Hypoventilation
- Restricted Chest Wall, congenital or acquired
- Obstructive Sleep Apnea
- Spinal Cord Injuries
