Fig. 1.

a Queries prevalence of PD patients. (Q1) Relationships between COVID-19 and PD; (Q2) changes in neurological symptoms occurred in that period; (Q3) occurrence of intercurrent medical/surgical conditions in that period; (Q4) clinical services. b and c Frequency of various items pertinent to Q2 and Q4. b Frequency of symptoms worsened during the lockdown. c Frequency of issues regarding clinical services interrupted by the lockdown. d. disturbances, other abbreviations spelled out in the text