Verayunia, S.S., Wulan, S.M.M., Handajani, N.I., Darma, A. and Melaniani, S. 2022. Effects of adding interferential current (IFC) in standard therapy (Lactulose) in cerebral palsy children with constipation: A randomized controlled trial. International journal of health sciences. 6, S9 (Sep. 2022), 466–478. DOI:https://doi.org/10.53730/ijhs.v6nS9.12372.