Dr. Anatoly Zhitkovich served as the National Academy of Sciences (NAS) selected expert to evaluate EPA's Plan to conduct Integrated Risk Information System (IRIS)  Assessment of Inhalation Exposure to Cobalt and Cobalt Compounds. The EPA held a public meeting on this topic on 1-11-23 where Dr. Zhitkovich gave two presentations. The first presentation was on the "Association Between Lung and Adrenal Tumor Formation" and the second was on "Proposed MOA of Cobalt Carcinogenicity."