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To the Editor: The report by Isogai et al,1 studying 2672 patients (81.5% women) who had suffered Takotsubo syndrome (TTS) between 2010 and 2014, deriving from the ‘Diagnosis Procedure Combination nationwide inpatient database in Japan’ is an invaluable resource, since it comprises all patients with this pathology admitted to acute care hospitals in the entire nation, where TTS was originally described. …
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.