“…The characteristics of the included studies are presented in Table 1 . The 24 studies were clinical trials, of which thirteen were randomized controlled trials [ 19 , 25 , 26 , 27 , 28 , 29 , 35 , 36 , 37 , 38 , 39 , 41 , 42 ], four were uncontrolled trials [ 20 , 21 , 30 , 40 ], one was a non-randomized clinical trial [ 23 ], one was a non-randomized controlled trial [ 32 ], four were randomized crossover trials [ 22 , 24 , 31 , 33 ], and one was a non-randomized crossover trial [ 34 ].…”