“Sites”  

Site

  Site, as a three-dimensional immaterial entity, that is (partially or wholly) bounded by a material entity or it is a three-dimensional immaterial part thereof
  In more common usage, a "site" typically refers to a specific physical location or place rather than an immaterial entity.
  Examples of subsets, concepts, subjects and related entities of sites include:

chromosome fragile sites combining sites

allosteric sites neoplasms by site

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