So now that I have two stories set in this same 'verse, it's totally time for a Master Post, am I right? Of course I am. ;)
Title:
The Art of Bad TimingSummary: Danny has a condition he never bothered to tell Steve about. It comes back to bite him later, because that's just how Danny's life goes.
Title:
A Pre-Existing ConditionSummary: When Steve and Danny are taken prisoner by the very people they're investigating, their captors use Danny's condition against them in order to force Steve to cooperate.