Average daily nitrate and nitrite intake in the Belgian population older than 15 years., Temme, E H. M., Vandevijvere Stefanie, Vinkx C, Huybrechts I, Goeyens L, and Van Oyen Herman , Food Addit Contam Part A Chem Anal Control Expo Risk Assess, 2011 Sep, Volume 28, Issue 9, p.1193-204, (2011)