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R. Amann; T. Egger; R. Schuligoi. (2000). The tachykinin NK1 receptor antagonist SR140333 prevents the increase of nerve growth factor in rat paw skin induced by substance P or neurogenic inflammation. , 100(3), 0–615. doi:10.1016/s0306-4522(00)00315-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research