“…The cause-of-death determination is considered to be highly reliable in Finland, and the autopsy rate is high. 16 A skin disease strongly related to tobacco consumption, palmoplantar pustulosis 17 (known in some countries as palmoplantar pustular psoriasis [17][18][19] ) is considered a diagnostic entity apart from psoriasis in Finland. Inclusion of patients with the former diagnosis in a cohort of patients with psoriasis would overestimate the role of tobacco.…”