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Summary of significant accounting policies (Tables)
 12 Months Ended
Dec. 31, 2016
Summary of significant accounting policies  
Schedule of estimated useful lives of depreciable property, plant and equipment

                                                                                                                                                                  

 

 

•   Laboratory equipment

   

between 5 - 10 years

 

•   Office equipment

 

between 3 - 5 years