ko pathway ratio_in_study ratio_in_pop p_value ko05033 Nicotine addiction 1/1 56/7206 0.00777130169305 ko04727 GABAergic synapse 1/1 110/7206 0.0152650568971 ko05032 Morphine addiction 1/1 110/7206 0.0152650568971 ko04723 Retrograde endocannabinoid signaling 1/1 175/7206 0.0242853177908