Psychometric properties of the pain anxiety symptom scale among postoperative patients in Amol, Iran - Sharif-Nia, Hamid; Froelicher, Erika Sivarajan; Marôco, João; Hoseinzadeh, Esmaeil; Hejazi, Sima; Fatehi, Reza; Nowrozi, Poorya; Mohammadi, Bita (Frontiers in Psychiatry, 2024)