title: Reply to A El-Sohemy.
authors.affiliation: From the Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle Upon Tyne, United Kingdom (e-mail: john.mathers@newcastle.ac.uk).
authors.forename: Katherine M
authors.identifier: 0000-0002-9682-7541
authors.initials: KM
authors.lastname: Livingstone
authors.affiliation: From the Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle Upon Tyne, United Kingdom (e-mail: john.mathers@newcastle.ac.uk).
authors.forename: Carlos
authors.initials: C
authors.lastname: Celis-Morales
authors.affiliation: From the Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle Upon Tyne, United Kingdom (e-mail: john.mathers@newcastle.ac.uk).
authors.forename: John C
authors.identifier: 0000-0003-3406-3002
authors.initials: JC
authors.lastname: Mathers