The review included 36 articles, of which 10 were prospective randomized controlled, 1 non-randomized prospective, 15 observational prospective and 10 retrospective studies.
Revisaron 36 artículos, de los cuales 10 fueron prospectivos aleatorizados controlados, uno prospectivo no aleatorizado, 15 prospectivos observacionales y 10 retrospectivos.