Figure 3.

Presentation of the various stages leading to the diagnosis of amyotrophic lateral sclerosis (ALS). A: date of the first symptoms confirmed by a physician; B: date of the first complaint of the patient to GP; C: date of the first consultation to a neurologist; D: date of the first electroneuromyography (ENMG); D⁰: date of the first suspicion of ALS; D¹: date of the first ENMG giving clear argues for ALS; E: date of the diagnostic announcement of ALS.