TF and cardioembolic stroke: The MR-Egger approach did not produce evidence of directional pleiotropy in any of the analyses (for any stroke, iron P=0.85, ferritin P=0.59, transferrin saturation P=0.79, transferrin P=0.47; for cardioembolic stroke, iron P=0.12, ferritin P=0.51, transferrin saturation P=0.10, transferrin P=0.29).