“…In relation to the internal and external validity of the studies in the sample, our analysis revealed several factors that influenced the quality of clinical pathway evaluation. Most studies in our sample concerned non-randomly selected small patient populations without a power analysis [19,23,25,36,52,54,56,58,59,61,76,81,[86][87][88]91,99,107,111,118,122,123,126,128].…”