Fig. 5

Global cooperation among the top 20 most productive countries/regions (a) and funding agencies (b). USA, the United States of America; P. R. China, People’s Republic of China; US HHS, United States Department of Health Human Services; US NIH, United States National Institutes Of Health; US NINDS, United States National Institute of Neurological Disorders Stroke; NSFC, National Natural Science Foundation of China; EC, European Commission; Japan MEXT, Japan Ministry of Education Culture Sports Science and Technology; UKRI, UK Research Innovation; US NIGMS, United States National Institute of General Medical Sciences; DFG, German Research Foundation; UK MRC, UK Medical Research Council; US NEI, United States National Eye Institute; US NICHD, United States Eunice Kennedy Shriver National Institute of Child Health Human Development; CIHR, Canadian Institutes of Health Research; JSPS, Japan Society for the Promotion of Science; US NSF, United States—National Science Foundation; US DOD, United States Department of Defense; UK WT, UK Wellcome Trust; US VA, United States Department Of Veterans Affairs; US NIA, United States National Institute on Aging; NBRPC, National Basic Research Program Of China