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ALVAREZ, Efraín Antonio Cehua et al. Validation of the patient health questionnaire-9 (PHQ-9) in human medicine interns at a university of reference in Peru during the COVID-19 pandemic. Rev. Fac. Med. Hum. [online]. 2022, vol.22, n.3, pp.540-546.
Epub July 09, 2022. ISSN 1814-5469.
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