[{"arm_notes": "", "treatment_id": null, "treatment_name": "Classic olfactory training group (COT): 50 patients with post-COVID-19 olfactory dysfunction will undergo olfactory training with 4 essential oils (carnation; rose; eucalyptus and lemon). Modified olfactory training group (MOT): 50 patients with post-COVID-19 olfactory dysfunction will undergo olfactory training with 12 essential oils (carnation; rose; eucalyptus; lemon; tangerine; jasmine; thyme; mint; bergamot; tuberose; rosemary and lemon grass); with 4 oils used each month and repeated cyclically. Advanced olfactory training group (AOT): 50 patients with post-COVID-19 olfactory dysfunction will undergo olfactory training with 24 essential oils (carnation; rose; eucalyptus; lemon; tangerine; jasmine; thyme; mint; bergamot; tuberose; rosemary; lemon grass; citronella; vanilla; cedar; cinnamon; cardamom; tonka bean; sandal; black pepper; orange blossom; lavender; orange; vetiver); with 8 oils used each month and repeated in a cyclic manner. All groups will perform olfactory training twice a day for 15 seconds on each essence for 12 months. They will be reassessed at 4; 12; 24 and 52 weeks after starting the proposed treatment; and the University of Pennsylvania Smell Identification Test (UPSIT) will be performed at each visit.;D10.627.675;G16.500.275.640", "treatment_type": "TODO", "pharmacological_treatment": "TODO"}]

[{"arm_notes": "", "treatment_id": 2163, "treatment_name": "Modified olfactory training (12 essential oils)", "treatment_type": "Olfactory training", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "", "treatment_id": 919, "treatment_name": "Olfactory training", "treatment_type": "Olfactory training", "pharmacological_treatment": "Non pharmacological treatment"}]