Malignancy in the last 2 years, with the exception of cutaneous squamous and basal cell tumors
Untreatable advanced dysfunction of another major organ system
Noncurable chronic extrapulmonary infection, including chronic active HBV, HCV and HIV
Significant chest wall or spinal deformity
Documented nonadherence or inability to follow through with medical therapy or office follow-up, or both
Untreatable psychiatric or psychologic condition associated with the inability to cooperate or comply with medical therapy
Absence of a consistent or reliable social support system
Substance addiction that is either active or within the last 6 months