When you must draw several trauma tokens at once, do you draw them one at a time or all together?

Question

Accepted Answer

Most players draw all the tokens at once, then resolve them together, but the Exodus rules are vague on this, so agree it at the table. A disaster token drawn on a replacement character is set aside and another token is drawn instead.

Battlestar Galactica: The Board Game

When you must draw several trauma tokens at once, do you draw them one at a time or all together?