I was reading and posting about this research too late at night last night
because I just discovered a sentence in the introduction that I missed
earlier.

In their previous experiment the researchers "instilled 0.4 ml per kg of
breast milk at its native pH level (6.6 - 7.4) into rabbits' lungs [and]
found NO EVIDENCE of lung injury."  Emphasis mine.

So I would presume then that cup-fed human milk would also cause no harm.

That study was the Can J Anaesth 1994 41:A57 article by Shorten et al: The
efffects of pulmomary aspiration of human breast milk and normal saline in
the intubated rabbit.
And, these reserachers are associated with The Hospital for Sick Children in
Toronto in Jack Newman's back yard, so to speak.

Mardry Swenson