“…HLoF variants have also been identified in genes that affect disease risk (Karczewski et al, 2020), e.g., ACTN3, which is associated with ageing (Yang et al, 2003), HAO1, which is associated with kidney dysfunction (McGregor et al, 2020), and LRRK2, which is associated with Parkinson's disease (Whiffin et al, 2020). Similarly, in a recent analysis of 219 populations from 64 countries across Asia, it was reported that 43% of all proteincoding genes contain at least one protein-truncating variant, suggesting that HLoF variants can be well tolerated (Wall et al, 2019). In addition, a study of more than 500,000 human genomes examining 874 genes reported 13 individuals with disease-causing mutations in eight different genes, with two individuals carrying HLoF mutations leading to PTCs, although with no reported clinical manifestation of disease (Chen et al, 2016b).…”