Fig. 2
From: Research progress of heat stroke during 1989–2019: a bibliometric analysis
Contributions of different countries/regions to the research field regarding HS. a The number of publications, citation frequency (×0.05), H-index (×5) and GDP (×5, per trillion dollar) in the top 20 countries or regions; b The number of publications worldwide and the time course of relative research interest of HS; c The number of publications from the top three and other countries per year. RRI. Relative research interest