AND combination regression coefficients:
-8.211799,1.104871	-8.347817,1.089470	-8.535923,1.108021	-1.643009,0.456997	-6.268236,0.737667	-2.086342,0.340490	-2.706100,0.385599	-1.590813,0.310530	0.882540,0.053808	-2.089819,0.327040	-4.321932,0.482075	-3.365646,0.381238	-0.824478,0.139394	-0.754006,0.146609