“…Twelve studies had participants equal to or greater than this [4,5,7,8,9,31,33,35,36,42,48,54]. Seventeen articles described the method in enough detail to enable it to be replicated accurately [4,6,9,31,32,33,34,35,36,38,39,40,42,44,45,48,52]. All studies gave a description of where the sensors were located, with 19 of them giving a description that was clear and accurate [4,5,6,7,8,9,12,31,32,34,35,36,40,43,44,46,47,48,52].…”