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**Respiratory** The exact mechanism of action of caffeine in treating apnea related to prematurity is unknown, however, there are several proposed mechanisms, including respiratory center stimulation in the central nervous system, a reduced threshold to hypercapnia with increased response, and increased consumption of oxygen, among others

These proteins play a crucial role in iron metabolism, particularly in the biogenesis of FeS clusters, as well as in the transport of iron [38,39] (Figure 1)

European multicenter study on propionyl-L-carnitine in intermittent claudication

Ann Fac Med Sa Paulo 9:69 Dettman JR, Jacobson DJ, Taylor JW (2003) A multilocus genealogical approach to phylogenetic species recognition in the model eukaryote Neurospora