Any licensed doctor of podiatric medicine whose name, office address or place of practice is mentioned in any advertisement of any kind or character shall be presumed to have caused, allowed, permitted, approved and sanctioned such advertising and shall be presumed to be personally responsible for the content and character thereof. Once sufficient evidence of the existence of the advertisement has been introduced at any hearing before the Washington podiatric medical board, the burden of establishing proof to rebut this presumption by a preponderance of the evidence shall be upon the doctor of podiatric medicine.