Soleymani, A., A. Masjedi Arani, S. A. Raeissadat, and M. H. Davazdahemamy. “Validity and Reliability of the Persian Version of the Chronic Pain Grade Questionnaire in Patients With Musculoskeletal Pain”. Advances in Nursing & Midwifery, vol. 28, no. 3, Oct. 2019, pp. 35-39, https://journals.sbmu.ac.ir/en-jnm/article/view/24990.