Mird237 2021 Link

Another possibility is that the user refers to a specific research paper or a technical document from 2021 under the MIRD committee's work, but it's not named MIRD237. Without more context, it's challenging, but given the information available, I can infer that the nearest relevant reference is MIRD Pamphlet No. 24 from 2021, which is a significant publication in the field of radiation dosimetry.