To the extent required to comply with Code section 422, in no event shall any person be granted Incentive Stock Options to the extent that the Shares covered by such options (and any Incentive Stock Options granted under any other plans of the Company and its Subsidiaries) that may be exercised for the first time by such person in any calendar year have an aggregate Fair Market Value in excess of $100,000. For this purpose, the Fair Market Value of the Shares shall be determined as of the dates on which the Incentive Stock Options are granted. It is intended that the limitation on Incentive Stock Options provided in this subsection be the maximum limitation on options which may be considered Incentive Stock Options under the Code, and this subsection shall be construed and applied in accordance with Code section 422.

Incentive Options. Any Option designated by the Committee as an Incentive Option will be subject to the general provisions applicable to all Options granted under the Plan plus the following specific provisions:

Qualification of Incentive Stock Options. No Incentive Stock Option shall be granted to any person who is not an Employee of the Company or any "parent corporation" or "subsidiary corporation" of the Company (as defined in Sections 424(e) and 424(1) of the Code, respectively). No person who qualifies as a Greater Than 10% Stockholder may be granted an Incentive Stock Option unless such Incentive Stock Option conforms to the applicable provisions of Section 422 of the Code. Any Incentive Stock Option granted under the Plan may be modified by the Administrator, with the consent of the Participant, to disqualify such Option from treatment as an "incentive stock option" under Section 422 of the Code. To the extent that the aggregate fair market value of stock with respect to which "incentive stock options" (within the meaning of Section 422 of the Code, but without regard to Section 422(d) of the Code) are exercisable for the first time by a Participant during any calendar year under the Plan and all other plans of the Company or any "parent corporation" or "subsidiary corporation" of the Company (as defined in Section 424(e) and 424(1) of the Code, respectively) exceeds one hundred thousand dollars ($100,000), the Options shall be treated as Non-Qualified Stock Options to the extent required by Section 422 of the Code. The rule set forth in the preceding sentence shall be applied by taking Options and other "incentive stock options" into account in the order in which they were granted and the Fair Market Value of stock shall be determined as of the time the respective options were granted. In addition, to the extent that any Options otherwise fail to qualify as Incentive Stock Options, such Options shall be treated as Nonqualified Stock Options.

Limit on Incentive Stock Options. Notwithstanding anything to the contrary contained in this Plan, and subject to adjustment as provided in Section 11 of this Plan, the aggregate number of shares of Common Stock actually issued or transferred by the Company upon the exercise of Incentive Stock Options will not exceed 1,675,000 shares of Common Stock.

Limitations on Incentive Stock Options. Notwithstanding anything in this Agreement (or in any Award Agreement evidencing the grant of an Option hereunder) to the contrary, Incentive Stock Options shall be transferable only to the extent permitted by Section 422 of the Internal Revenue Code and the treasury regulations thereunder without affecting the Option’s qualification under [Section 422] as an Incentive Stock Option.

Stock Incentive. A recommendation will be submitted to the board of directors of the Company to grant you options to acquire 33,360 shares of common stock, with a strike price equal to the fair market value of the Company’s common stock on the day of the grant. The stock options will be subject to the terms of the Company’s Amended and Restated 2008 Stock Incentive Plan (the “Equity Plan”) and a stock option grant document. Vesting will occur over a four-year period with a one-year cliff (25% vested after 12 months with 2.083% vesting at the end of each month thereafter). Notwithstanding the foregoing, in the event that the Company closes a Series C financing transaction or there is a Sale Event (as defined in the Equity Plan), then the one-year cliff vesting shall not apply, and you shall vest monthly in your award starting on the first full month following your date of hire. In addition, upon a Sale Event you shall immediately accelerate in your vesting such that 50% of your then unvested shares shall accelerate and vest as of the Sale Event.

By its approval of this Agreement, the Company’s Board of Directors has approved the issuance to Executive of an option to acquire 5,000,000 shares of the Company’s Common Stock, under and pursuant to the provisions of the ​ 2007 Stock Option Plan, as adopted by the Company’s Board of Directors and as approved by the Company’s Shareholders (the “Plan”) and on the terms set forth in the Stock Option Agreement annexed to this Agreement as [Exhibit A] (the “Option Agreement”), which provides inter alia that such option shall vest as set forth below, and be exercisable at the exercise price of $0.24 per share (which is the closing market price of the Company’s Common Stock on the date hereof) at any time during the five (5) year period following the date hereof (subject to earlier termination as provided under the Plan):

Stock Options. You will also be granted a non-qualified stock option to purchase a number of shares of the common stock of the Company equal to 0.65% of the Company’s fully-diluted common stock. The exercise price per share will be equal to the fair market value per share on the grant date of such options by the Compensation Committee of the Board of Directors. You will vest in 25% of the option shares on the first anniversary of the commencement of employment and 1/36th of the option shares each month thereafter. The terms and conditions of the options will be more fully described in the Company’s Amended and Restated 2003 Stock Incentive Plan and Stock Option Agreement to be provided to you.

Stock Options. Any outstanding stock options held by an employee as of the date of his or her Qualifying Retirement shall be exercisable only to the extent such stock options are exercisable as of such date or become exercisable pursuant to the terms of the underlying option award agreements and shall remain exercisable until the option expiration date.

Performance Incentive Options. You will be eligible for a discretionary annual Performance Incentive Options award beginning in 2021, based on previous year performance. In determining whether to grant an options bonus, in its discretion, the Board of Directors of the Company will take into account your performance and milestone achievements. Performance Incentive Options are subject to approval and discretion of the Board of Directors of the Company. Performance objectives will be defined in alignment with the corporate goals.