2021 — Mird237

If the user intended a different context for MIRD237, such as a specific study, conference, or working group, they might need to provide additional details. However, based on the existing MIRD publications and the year 2021, I can focus on the MIRD Pamphlet No. 24 as the most plausible reference. Alternatively, if MIRD237 is part of another organization's nomenclature not related to SNMMI's MIRD, I would need more information. Given the constraints, I'll proceed with the assumption that MIRD237 2021 is a misinterpretation or mislabeling of the MIRD Pamphlet 24 from 2021, and develop the write-up around that document, explaining its importance and key points.