Open Access

Fig. 10


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Year wise matrix plot for number of studies in various Countries (US = United States, UK = United Kingdom, Aus = Australia, FR = France, TN = Taiwan, SL = Switzerland, SA = Saudi Arabia, PG = Portugal, NG = Nigeria, NL = Netherlands, IL = Israel, GM = Germany, BZ = Brazil, Ind = India, Rom = Romania, KR = Korea, TL = Thailand).

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