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Comparison of the factor structure of the patient health questionnaire for somatic symptoms (PHQ-15) in Germany, the Netherlands, and China

Leonhart, Rainer, De Vroege, Lars, Zhang, Lan, Liu, Yang, Dong, Zaiquan, Schäfert, Rainer, Nolte, Sandra, Fischer, Felix, Fritzsche, Kurt, Van der Feltz-Cornelis, Christina M.
2018