type	path
L1	https://raw.githubusercontent.com/nf-core/test-datasets/raredisease/reference/grch37_g1k_l1_21.bed
SVA	https://raw.githubusercontent.com/nf-core/test-datasets/raredisease/reference/grch37_g1k_sva_21.bed
ALU	https://raw.githubusercontent.com/nf-core/test-datasets/raredisease/reference/grch37_g1k_alu_21.bed
HERV	https://raw.githubusercontent.com/nf-core/test-datasets/raredisease/reference/grch37_g1k_herv_21.bed