Each state employee who sustains an injury arising out of and in the course of his employment, except as provided in section 5-142, shall be paid compensation in accordance with the provisions of the Workers’ Compensation Act. The injured state employee may elect to receive, in addition to the benefits due him as workers’ compensation, an amount which will result in his receiving his full salary or wages for the period of any accumulated sick leave, computed on an hourly basis, due him. Upon expiration of such period of sick leave the provisions of the Workers’ Compensation Act shall apply.