Department of Neurology Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 ChinaDepartment of Neurology Fourth Affiliated Hospital School of Medicine Zhejiang University Yiwu 322000 China;
Department of Neurology Qianfoshan Hospital Shandong University Jinan 16766 China;
Hereditary spastic paraplegia; SPG3A; Age at onset; ATL1; Mutation; Genotype-phenotype correlation;