Cuba (2) Estudio (2) nécessité (2) Evolution (Biology) (1) Valuation (1) Time (1) Senses and sensation (1) Research (1) Public health personnel (1) Production (Economic theory) (1) Methodology (1) Medical sciences (1) Medical personnel (1) Interest (1) Industrial productivity (1) Indexes (1) Hospitals (1) Health (1) Fatigue (1) Anxiety (1) Personal de salud pública (1) Personal sanitario (1) Valoración (1) Salud (1) Frustración (1) Interés (1) Ciencias biomédicas (1) Lengua usan (1) Voz (1) Índices (1)