Update README.md

README.md

@@ -76,5 +76,5 @@ Peng C, Yang X, Chen A, Smith KE, PourNejatian N, Costa AB, Martin C, Flores MG,
 
 <h2>Contact</h2>
 
-- Yonghui Wu: yonghui.wu 'at' ufl.edu
-- Cheng Peng: c.peng 'at' ufl.edu
+- Yonghui Wu: yonghui.wu@ufl.edu
+- Cheng Peng: c.peng@ufl.edu