Validity of distress thermometer for caregivers of cancer patients in Saudi Arabia - Muneera A. AlKhorayef; Manal M. AlJurbua; Nouf A. AlHussaini; Reema A. AlMasoud; Ajeed M. Al Rashoud; Abdulillah M. Al Rashoud; Abdulmajeed A. Zarbah; Fahad D. Alosaimi (PLoS ONE, 2026)