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In data mining and statistics, hierarchical clustering[1] (also called hierarchical cluster analysis or HCA) is a method of cluster analysis that seeks to build a hierarchy of clusters. Strategies for hierarchical clustering generally fall into two categories: Agglomerative: Agglomerative clustering, often referred to as a "bottom-up" approach, begins with each data point as an individual ...
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Hydroxycitric acid (HCA) is a derivative of citric acid that is found in a variety of tropical plants including Garcinia cambogia and Hibiscus sabdariffa. [1] There are four isomers, (+)- and (-)-hydroxycitric acid, and (+)- and (-)-allo-hydroxycitric acid. The (-)-hydroxycitric acid isomer is the one found in Garcinia. [2]
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HCA Healthcare, Inc. (historically known as Hospital Corporation of America) is an American global for-profit operator of health care facilities that was founded in 1968. It is based in Nashville, Tennessee, and, as of May 2020, owned and operated 186 hospitals and approximately 2,400 sites of care, including surgery centers, freestanding emergency rooms, urgent care centers and physician ...