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. 2021 Apr 24;71(12):2546–2557. doi: 10.1007/s12031-021-01846-2

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© The Author(s) 2021

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Fig. 1 — Representative pictures of mouse retinas to visualize retinal vasculature. The presence of oxygen-induced retinopathy (OIR) is indicated with a yellow area. PACAP deficiency affects the extent of retinopathy; control animals have completely vascularized retina on PD16