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Related Party Transactions
6 Months Ended
Jun. 30, 2013
Related Party Transactions [Abstract]  
Related Party Transactions
11. Related Party Transactions.

The Company has consulting arrangements with its Chief Medical Officer and with several members of its Scientific Advisory Board. During the three and six month periods ended June 30, 2013 and 2012, the Company paid approximately $2,500 and $10,000, and $5,000 and $21,000 respectively, in consulting fees to related parties.