Genetic Variants in SDC3, KCNA2, KCNK1, KCNK16, and Heat Shock Transcription Factor-1 Genes: An Exploratory Analysis Supporting the Piezo2 Channelopathy Hypothesis in Amyotrophic Lateral Sclerosis Onset. The gene discussed is PIEZO2; the disease is amyotrophic lateral sclerosis.