Geography of randomized controlled trials in general internal medicine: is the United States' share declining?
Mahbubur
M
Rahman
Tsuguya
T
Fukui
D015706:Bibliometrics; D006801:Humans; D007388:Internal Medicine / Q000639:trends*; D016032:Randomized Controlled Trials as Topic / Q000639:trends*; D014481:United States