Are the unidentified RNC emailers Cheney aides?

Yesterday, the Republican National Committee released a list of 37 White House officials who use RNC email accounts. But at least a dozen or so other White House officials with RNC accounts remain unidentified. Emptywheel notes that while the list released yesterday includes several former Cheney aides, it has not a single current aide to the Vice President. Are Cheney’s current staffers among the unidentified officials?