Delta centrality measures the importance of a node related to the ability 
of the network to respond to the deactivation of the node from the network. 
 
Also known as: INFORMATION_CENTRALITY 
 
 Systems Biology and Evolution Toolbox (SBEToolbox). 
 Authors: James Cai, Kranti Konganti. 
 (C) Texas A&M University. 
 
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