igf-1 lr3 nasal spray work IGF-1 LR3: Nasal Spray vs.
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Cheng et al., 2016
Retinoids work mainly by increasing cell turnover

doi: 10.1073/pnas.92.21.9475

doi: 10.1038/s41388-018-0187-2 64 ShahMHLoriganPOBrienMERFossellaFVMooreKNBhatiaSet al
