Currently pregnant, Participant with life expectancy of less than 6 months, Any medical contraindications or refusal by the individual or their legal representative to intubation and mechanical ventilation, Preexisting mechanical ventilation due to other conditions, Inability or unwillingness of individual or legal representative to give written informed consent.

Currently pregnant, Participant with life expectancy of less than 6 months, Any medical contraindications or refusal by the individual or their legal representative to intubation and mechanical ventilation, Preexisting mechanical ventilation due to other conditions, Inability or unwillingness of individual or legal representative to give written informed consent.