Fixed assets consist of the following at December 31, 2016 and 2015:

Depreciation expense for the above fixed assets for the years ended December 31, 2016 and 2015, respectively, was $2,947 and $4,332.

During the year ended December 31, 2016, the Company abandoned production equipment, building, leasehold improvements, and office equipment with an original cost totaling $1,016,532 that had been located in the production center. Additionally the Company removed the linear accelerator form the production center and has placed the equipment into storage. The $1,375,000 original cost of the linear accelerator was also written off during the year ended December 31, 2016. All of the equipment written off during the year ended December 31, 2016 had been fully depreciated.