(b) Each contract for a regional screening program shall be upon such terms and conditions as the commissioner determines, provided, however, that expenses incurred shall be reimbursed by the state after applying against the total cost of screening and diagnosis the amounts received from third party payers and less any fee charged each person receiving such services where the commissioner shall determine a sliding fee scale based on ability to pay. 3. Each provider of health care that enters into a contract as provided for in this section shall conduct a training program in conjunction with the department for purposes of instructing physicians, physician assistants and nurses within the respective health systems agency in the detection, diagnosis, treatment and prevention of diethylstilbestrol exposed persons. 4. The bureau of cancer control within the health department shall establish and maintain a registry of women who took diethylstilbestrol during pregnancy and their offspring who were exposed to diethylstilbestrol prenatally for the purpose of follow-up care and treatment of long term problems associated with diethylstilbestrol exposure. Enrollment in the registry shall be upon a voluntary basis. 5. The commissioner may request and shall receive from any department, division, board, bureau, commission or agency of the state or of any political subdivision thereof such assistance and data as will enable him to properly carry out his activities hereunder and effectuate the purposes herein set forth. The commissioner may also enter into any contract for services as he deems necessary with a private agency or concern upon said terms and conditions as he deems appropriate. 7. Special programs as provided for in this section shall be conducted within the appropriation made therefor.