Shatri H, Sinulingga DI, Faisal E, Irvianita V, Putranto R, Ardani Y, Erlita D, Jeger DP, Browijoyo IA. Validity and reliability testing of the Shatri Sinulingga psychosomatic test (SSPT) questionnaire as a screening instrument for psychosomatic disorders in Indonesia. Narra J [Internet]. 2024Nov.8 [cited 2025Sep.17];4(3):e1373. Available from: https://www.narraj.org/main/article/view/1373