@Winnie - it said three cabin „crew“. That would not include a patient. Therefore my comment.
@havoc - even if the third member was a trainee, where would he sit? You think he laid on the stretcher?😉
@ LRP - what middle seat? All „stretcher“ configurations I know have a pilot up front, two seats (one half of the four row bench) behind him and the stretcher beside the pilot from front to back. So in the whole aircraft there only are three seats (incl. pilot) and a stretcher. So to my knowledge no chance of three „cabin crew“.
But you never stop learning, so maybe you can point out another lay-out to me.