“…All of the medical case reports originated in Japan; three involved the development of acute eosinophilic pneumonia in users of heated tobacco products after normal use of their products (Kamada et al, 2016;Aokage et al, 2019;Tajiri et al, 2020) whilst two involved the intentional misuse of heated tobacco products or their constituents (Hitosugi et al, 2019;Yumoto et al, 2020). Of these two medical case reports, one detailed a case of attempted homicide in a user after tampering of his heated tobacco product with elemental mercury by a third party (Hitosugi et al, 2019), whilst the second involved the intentional ingestion of sticks associated with a heated tobacco product (Yumoto et al, 2020). Of the five medical case reports, two provided details as to the heated tobacco product involved (Hitosugi et al, 2019;Yumoto et al, 2020), two provided no details (Aokage et al, 2019;Tajiri et al, 2020) whilst for the final medical case report, the heated tobacco product involved could be deduced from one of the pictures provided in the original article (Kamada et al, 2016).…”