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[DOI] [PMC free article] [PubMed] [Google Scholar] 31.Stieh D.J., King D.F., Klein K., Liu P., Shen X., Hwang K.K., Ferrari G., Montefiori D.C., Haynes B., Pitisuttithum P., et al

And I can keep that going for, you know, five to six hours of deep work over the course of a morning

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PMID:14986904, Suppl 4 Gillespie CM, Merkel AL, Martin AA: Effects of insulin-like growth factor-I and LR3IGF-I on regional blood flow in normal rats
