OTU_A	OTU_B	CORRELATION
18	310	0.98
18	331	1
18	401	1
18	405	0.92
37	72	0.96
37	74	1
37	632	-0.2
72	74	-0.2
72	109	0.97
72	112	-0.1
72	632	-0.05
74	243	0.98
74	253
