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Description
Leen JLS, Juurlink DN (2019) Carfentanil: a narrative review of its pharmacology and public health concerns
V.KanferG.PickrellA

GHK-Cu solution may show a faint blue or green tint after reconstitution

However, the study design of this trial was incomplete, lacking a placebo control group and utilizing a small sample size (Endo et al., 2011)
