“…These effects were only short-term, as after combined interventions physiological parameters returned to initial values. Regardless of the variation in the methodological approach, other studies investigating the effects of combination therapy generally also reported stable or slightly beneficial changes in vital parameters during and after combination therapy [ 24 , 28 , 29 , 30 , 31 , 40 ]. Previous studies have reported that both KC and music therapy are well accepted, cost-effective, accessible, and safe methods that improve physiological parameters and neurodevelopmental outcomes, and reduce infant stress [ 13 , 18 , 20 ].…”