[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "TENS - high-dose", "treatment_type": "DEVICE", "pharmacological_treatment": "TODO"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "TENS - high-dose", "treatment_type": "DEVICE", "pharmacological_treatment": "TODO"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "TENS - high-dose", "treatment_type": "DEVICE", "pharmacological_treatment": "TODO"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "TENS - low-dose", "treatment_type": "DEVICE", "pharmacological_treatment": "TODO"}]

[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "Electrical Stimulation - Active", "treatment_type": "Device", "pharmacological_treatment": "TODO"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Electrical Stimulation - Placebo", "treatment_type": "Device", "pharmacological_treatment": "Placebo"}]

[{"arm_notes": "", "treatment_id": 454, "treatment_name": "Electrical stimulation", "treatment_type": "Medical device", "pharmacological_treatment": "Non pharmacological treatment"}, {"arm_notes": "", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]