Corrigendum: Integrated Genetics and Micronutrient Data to Inform the Causal Association Between Serum Calcium Levels and Ischemic Stroke - Meng, Qiang; Huang, Lu; Tao, Kai; Liu, Yong; Jing, Jiangpeng; Wang, Wen; Qin, Huaizhou; Feng, Dayun; Cai, Qing (Frontiers in Cell and Developmental Biology, 2020)