15994
Established in 2005 , the Institute of Pharmacogenetics at the University Hospital Essen ( Essen , Germany ) , headed by Winfried Siffert , is devoted to the discovery and validation of genetic variants that may impact upon drug responses especially in the field of cardiovascular disorders and cancer .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None