Hello,
Most of those studies were not conducted in large-scale or multinational, and many were recall-based questionnaire studies, which is hard to reflect the overall results.
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No. Say eg Most of those studies were not conducted in a large-scale or multinational manner , and many were in the form of recall-based questionnaires. This makes it hard to determine the overall results.
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.No. Say
eg Most of those studies were not conducted in a large-scale or multinational manner, and many were in the form of recall-based questionnaires. This makes it hard to determine the overall results.