@techreport{Entzel2009,
author = {Entzel, P. and Whitsel, E.A. and Richardson, A. and Tabor, J. and Hallquist, S. and Hussey, J.M. and Halpern, C.T. and Harris, K.M.},
title= {Add Health Wave IV documentation. Cardiovascular and anthropometric measures},
year = {2009},
URL = {http://www.cpc.unc.edu/projects/addhealth/data/guides/Wave%20IV%20cardiovascular%20and%20anthropometric%20documentation%20110209.pdf },
}