Psychometric properties of the Swedish version of the Patient Health Questionnaire-9: an investigation using Rasch analysis and confirmatory factor analysis by David Forsström, Farzaneh Badinlou, Magnus Johansson, Olivia Ojala, Samir El Alaoui, Kristoffer N. T. Månsson, Alexander Rozental, Johan Lundin, Simon Jangard, Shervin Shahnavaz, Karolina Sörman, Nitya Jayaram-Lindström, Tobias Lundgren, Markus Jansson-Fröjmark, Maria Hedman-Lagerlöf

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