“…Eight studies were graded as high 9, 20, 24, 26–29, 51, 12 as moderate 11, 13, 19, 30–32, 38, 44–46, 48, 49, and seven as low methodological quality 22, 23, 25, 33, 43, 47, 50. The quality scores ranged from six (low) to 14 (high) (mean ± standard deviation 10 ± 2.2).…”