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Daily mean (± standard deviation) growth hormone (GH) and insulin-like growth factor-1 (IGF-1) levels in male and female traumatic brain injury patients (n = 101). (A) GH (n = 101). (B) IGF-1 (age 16–24 years; n = 34). (C) IGF-1 (age 25–39 years; n = 32). (D) IGF-1 (age 40–54 years; n = 19). (E) IGF-1 (age > 55 years; n = 16).
