I'm doubting that a doctor wrote this. It just doesn't read like how a doctor writes. Look at rockleo's posts, that's how a doctor writes.
His reference to ARDS as "Adult Respiratory Distress Syndrome". No, it's "Acute Respiratory Distress Syndrom".
He doesn't mention ECMO once.
He only speaks in layman's terms. No use of intubation, categories of patients (m/m, s/c, etc).
Doctor? Doubtful.