“…The types of indicator that were used to measure research performance in each study included number of publications ( n = 38), 14,16–30,32–40,42–44,47,48,51–57,60 number of citations ( n = 27), 14–17,20–23,26–28,30,32–34,36,37,39,41–43,45,51,52,55,57,63 Impact Factor ( n = 15), 20,24,28,35,38,42,44,46,48,49,52,54,56,61,62 research funding ( n = 10), 17–19,27,29,30,32,33,35,56 degree of co-authorship ( n = 9), 20,31,37,38,41,49,52,56,57 population size ( n = 6), 24,...…”