Each <data type>_interactions.txt file contains the following fields (tab-delimited):

	1) p_chr - promoter chromosome
	2) p_start - promoter start position
	3) p_end - promoter end position
	4) p_strand - promoter strand (+,-,*)
	5) e_chr - enhancer chromosome
	6) e_start - enhancer start position
	7) e_end - enhancer end position
	8) e_strand - enhancer strand (*)
	9) cell_type - In which cell type the EP links was found
	10) prom_id - promoter id
	11) enh_id - enhancer id
	12) ep_dist - distance from enhancer (center position) to promoter (center position; TSS in GRO-seq). Negative/Positive distance means that the enhancer is upstream/downstream to the promoter.
	13) sym_id - gene symbols separated by ';' annotated with the promoter
	14) ent_id - entrez genes separated by ';' annotated with the promoter
	15) ens_id - ensembl genes separated by ';' annotated with the promoter
	16) ref_id - RefSeq mRNAs/ncRNAs separated by ';' annotated with the promoter