Fig. 1From: Is insulin-like growth factor-1 involved in Parkinson’s disease development?Chronology of clinical symptoms in Parkinson’s disease (modified from Kalia et al. [8]). Schematic representation of the diagnosis (even 10 to 20 years before the onset of the disease) and motor/non-motor symptoms in early and advanced stages of Parkinson’s disease, with clinical and other iatrogenic symptomsBack to article page