“…These subjects were referred late, presenting in critically ill condition after treatment failure [31] . Of the remaining 42 papers included in final review ( Table 2 ) [5] , [6] , [7] , [11] , [15] , [16] , [17] , [18] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] , [51] , [52] , [53] , [54] , [55] , [56] , [57] , [58] , [59] , [60] , [61] , [62] , [63] , twelve articles contained data from before and after 1990 [6] , [7] , [15] , [35] , [45] , [46] , [48] , [49] , [58] , [60] , [62] , [63] ...…”