Exhibit 3.91

ARTICLES OF INCORPORATION

OF

RXSD INC.

FIRST:The name of this corporation is:

RXSD INC.

SECOND:Its principal office in the State of Nevada is located at 502 East John Street, Carson City, Nevada, 89706. The name and address of its resident agent is CSC Services of Nevada, Inc., at the above address.

THIRD:The nature of the business or objects or purposes proposed may be organized under the General Corporation Law of the State of Nevada;

To engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Nevada.

FOURTH:The total authorized capital stock of the corporation is 25,000 shares with a $1.00 par value each.

FIFTH:The governing board of this corporation shall be known as directors, and the number of directors may from time to time be increased or decreased in such manner as shall be provided in the by-laws of this corporation, provided that the number of directors shall not be reduced less than one unless there is less than one stockholder.

The name and post office address of the first board of directors, which shall be one in number, is as follows:

NAME	POST OFFICE ADDRESS
Mike Olry	1430 East Greg Street, Suite 101
Sec./Dir.	Sparks, Neveda 89431

SIXTH:The capital stock, after the amount of the subscription price, or par value, has been paid in, shall not be subject to assessment to pay the debts of the corporation.

SEVENTH:The name and post office address of the incorporator signing the articles of incorporation is as follows:

NAME	POST OFFICE ADDRESS
B. Gould	502 E. John Street
	Carson City NV 89706

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EIGHTH:The corporation is to have perpetual existence.

NINTH:In furtherance and not in limitation of the powers conferred by statute, the board of directors is expressly authorized, subject to the by-laws, if any, adopted by the shareholders, to make, alter or amend the by-laws of the corporation.

TENTH:Meetings of stockholders may be held outside of the State of Nevada at such place or places as may be designated from time to time by the board of directors or in the by-laws of the corporation.

ELEVENTH:This corporation reserves the right to amend, alter, change or repeal any provision contained in the articles of incorporation, in the manner now or hereafter prescribed, and all rights conferred upon stockholders herein are granted subject to this reservation.

I, THE UNDERSIGNED, being the sole incorporator herein before named for the purpose of forming a corporation pursuant to the General Corporation Law of the State of Nevada, do make and file these articles of incorporation, hereby declaring and certifying that the facts herein stated are true, and accordingly have hereunto set my hand this 23rd day of December, A.D. 1997.

/s/ B. Gould

B. Gould, Incorporator

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STATE OF NEVADA	)
	SS
CARSON CITY	)

On this twenty third day of December, A.D., 1997, before me a Notary Public, personally appeared, B. Gould, who severally acknowledged that he/she executed the above instrument.

/s/ Cyndy Woodgate

Notary Public

CERTIFICATE OF ACCEPTANCE

OF

APPOINTMENT OF RESIDENT AGENT

I, B. Gould, Authorized Representative, on behalf of CSC Services of Nevada, Inc. hereby accepts appointment as Resident Agent of the above-named corporation.

/s/ B. Gould	December 22, 1997
Authorized Representative

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