Serum insulin-like growth factor-I (IGF-I) does not correlate positively with isometric strength, fatigue, and quality of life in post-polio syndrome.
Trojan DA, Collet J, Pollak MN, Shapiro S, Jubelt B, Miller RG, Agre JC, Munsat TL, Hollander D, Tandan R, et al. J Neurol Sci. 2001 Jan 1; 182(2):107-15.