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From the newsletter of the Annals of Improbable Research...

"Patient Mortality After Surgery on the Surgeon’s Birthday: Observational Study," Hirotaka Kato, Anupam B. Jena, and Yusuke Tsugawa, BMJ, vol. 371, 2020.

"980,876 procedures performed by 47,489 surgeons were analyzed. 2064 (0.2%) of the procedures were performed on surgeons’ birthdays..... Conclusions — Among Medicare beneficiaries who underwent common emergency surgeries, those who received surgery on the surgeon’s birthday experienced higher mortality compared with patients who underwent surgery on other days. These findings suggest that surgeons might be distracted by life events that are not directly related to work."