“…Eight studies stated that any medical disorder known to affect the autonomic nervous system was excluded [19,21,22,30,36,48,53,58]. Cardiovascular diseases, diabetes, and selected drugs were excluded in 13 studies [19,22,28,[31][32][33][34][35]43,45,55,58,63]. No exclusion criteria were reported in five studies [24,42,44,52,59].…”