9. Related Party Transactions

An officer of the Company serves on the executive management team of a CRO that provided clinical trial services to the Company.  For the years ended December 31, 2015 and 2014, the Company incurred an aggregate of approximately $218,000, and $255,000, respectively, in fees for these services.  As of December 31, 2015, accounts payable did not include any related party transactions.  As of December 31, 2014, accounts payable included approximately $22,000 of related party transactions.