LRRK2 and Parkinson disease: The LRRK2 p.Arg1628Pro variant is mostly identified as a secondary susceptibility genetic factor, especially in patients of Chinese descent, conferring a twofold risk of developing PD, with typical late‐onset L‐dopa‐responsive clinical phenotype in carriers (Cao et al., 2007; Liang et al., 2018; Ross et al., 2008; Zhao et al., 2020).