Subjects: RESEARCH evaluation; RESEARCH methodology evaluation; RESEARCH methodologyCUBA
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Subjects: EVALUATION of medical care; COVID-19 pandemic; PUBLIC healthCUBA; UNITED States
Subjects: DEATH; MEDICAL quality control; WORLD healthCUBA; UNITED States
Subjects: COVID-19 pandemic; PUBLIC health administrationCUBA
Subjects: COVID-19 pandemicCUBA; UNITED States