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Williams, Frances M K., Maria Popham, Philip N. Sambrook, Annette F. Jones, Tim D. Spector, και Alex J. MacGregor. Progression of Lumbar Disc Degeneration Over a Decade: A Heritability Study. BMJ Group, 2011.

Williams, Frances M K., et al. Progression of Lumbar Disc Degeneration Over a Decade: A Heritability Study. BMJ Group, 2011.