Fear (4) Anxiety (4) Miedo (4) Ansiedad (4) Health (3) Salud (3) Estudio (3) Sex (Biology) (2) Research (2) Perception (2) Noise (2) Diseases--Causes and theories of causation (2) Dentistry (2) Universe (2) Etiología médica (2) Universo (2) Percepción (2) Investigación (2) Sexo (2) Odontología (2) Ruido (2) Labor (1) Women physicians (1) Vocational education (1) Therapeutics (1) Tachycardia (1) Students (1) Oral medicine (1) Science (1) Responsibility (1)