This one’s a little bit of a cheat, as the story I’m about to share with you doesn’t concern Robotman, Elasti-Girl or negative man in any way, nor does it have any direct relevance on the World’s Strangest Heroes apart from the similarity of name. But as the Doom Patrol’s creators seemed to take inspiration for the name from war dramas–in particular, Dawn Patrol–it shouldn’t come as too much of a surprise that in 1956 Quality published a military story with the same name in G.I.COMBAT. It’s a quirk of fate that DC would later buy G.I. COMBAT from Quality (along with everything else) and continue it for decades. So in a way, there is a very loose connection.
The Grand Comics Database contains no credits for this story whatsoever, so your guess is as good as mine.