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Figure 4. Data point cloud and best fit lines, based on sub-studies selected by Griefahn et al. (Griefahn et al. 1976), subdivided into adults, children and old persons. (Reference: see (Griefahn et al. 1976)).

Figure 4. Data point cloud and best fit lines, based on sub-studies selected by Griefahn et al. (Griefahn
et al. 1976), subdivided into adults, children and old persons. (Reference: see (Griefahn et al. 1976)).