Definition thickness of of subcutaneous fat (backfat) from the last rib and shoulder regions Reference "COM-HU, based on:J.D Wood et al.: Backfat composition in pigs: Differences between fat thickness groups and sexes, Livestock Production Science, Volume 22, Issues 3–4, August 1989, Pages 351-362, http://www.sciencedirect.com/science/article/pii/0301622689900663 [18.10.2017]"