WICHITA, Kan. (AP) — A Kansas physician-legislator who has acknowledged that he is under investigation by the state medical board after supporting the deworming drug ivermectin is instructing doctors on COVID-19 treatment in a letter. The Wichita Eagle reports that Kansas Sen. Mark Steffen sent a letter on official Senate stationery to health care providers telling them that the way COVID-19 patients are treated has changed and that they will be shielded from Board of Healing Arts "interference." The Hutchinson Republican cites the recent Senate passage of a measure that specifically authorize...