Drugs, their targets and the nature and number of drug targets

@article{Imming2006DrugsTT,
  title={Drugs, their targets and the nature and number of drug targets},
  author={Peter Imming and Christian Sinning and Achim Meyer},
  journal={Nature Reviews Drug Discovery},
  year={2006},
  volume={5},
  pages={821-834}
}
What is a drug target? And how many such targets are there? Here, we consider the nature of drug targets, and by classifying known drug substances on the basis of the discussed principles we provide an estimation of the total number of current drug targets. 
Drugs, their targets and the nature and number of drug targets
TLDR
This work considers the nature of drug targets, and by classifying known drug substances on the basis of the discussed principles it provides an estimation of the total number of current drug targets.
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