title: Editorial preface to the fourth issue of 2011.
authors.affiliation: Executive Editor, Journal of Cardiovascular Disease Research, Department of Biology, College of Arts and Sciences, University of North Carolina at Greensboro, 321 McIver Street, 312 Eberhart Building, Greensboro North Carolina 27412, USA.
authors.forename: Zhenquan
authors.initials: Z
authors.lastname: Jia