ko pathway ratio_in_study ratio_in_pop p_value ko04744 Phototransduction 3/21 36/7206 0.00014319231365 ko05033 Nicotine addiction 2/21 56/7206 0.0113318462017 ko04727 GABAergic synapse 2/21 110/7206 0.0401519555653 ko05032 Morphine addiction 2/21 110/7206 0.0401519555653