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Accounts Payable (Tables)
12 Months Ended
Dec. 31, 2013
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Summary of Accounts Payable

Accounts payable at December 31 are summarized below:

 

     2013      2012  

External services

   $ 863,030       $ 678,813   

Supplies

     263,866         216,900   

Other

     25,007         103,652   
  

 

 

    

 

 

 

Total accounts payable

   $ 1,151,903       $ 999,365