[1] Maastricht Univ, Med Ctr, NUTRIM Sch Nutr Toxicol & Metab, Dept Hlth Promot, POB 616, NL-6200 MD Maastricht, Netherlands
[2] TNO, NL-3700 AJ Zeist, Netherlands
[3] Maastricht Univ, Med Ctr, CAPHRI Sch Publ Hlth & Primary Care, Dept Epidemiol, NL-6200 MD Maastricht, Netherlands
[4] Maastricht Univ, Med Ctr, CAPHRI Sch Publ Hlth & Primary Care, NUTRIM Sch Nutr Toxicol & Metab,Dept Hlth Promot, NL-6200 MD Maastricht, Netherlands