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Galbraith, Richard A.; Kappas, Attallah . (1991). Cobalt Protoporphyrin Regulates Body Weight in Beagle Dogs: Induction of Weight Loss in Normal Animals of Stable Adult Weight. Pharmacology, 43(2), 96–105. doi:10.1159/000138834 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research