FCN1 and cutaneous mastocytosis: Clinical data were available for 324 individuals, but due to sample limitations, we measured ficolin-1 in 176 individuals (which included 47 HCs, 63 with UM, and 66 with CM) and ficolin-2 in 193 individuals (including 62 HCs, 66 with UM, and 65 with CM) (see Fig. S1).