“…The distinction between CSU and UV was made only in some studies [25,35,53,55,57,58,124,138]. Many other studies had no clear differentiation between CSU and UV but the latter may have been termed 'vasculitis' [20,23,54,125,128,129], 'vasculitic rash' [139], 'dermal vasculitis' [28,133] or 'cutaneous vasculitis' [28,37,126,127,140] that allowed us to assume that most of the patients with urticarial rash in these studies are patients with CSU. Almost all authors in these studies used Gilliam and Sontheimer classification of SLE skin manifestations [32] that support this suggestion.…”