title: Three authors reply.
authors.forename: Abdulrahman M
authors.initials: AM
authors.lastname: El-Sayed
authors.forename: Peter
authors.initials: P
authors.lastname: Scarborough
authors.forename: Sandro
authors.initials: S
authors.lastname: Galea
mesh_terms: D003198:Computer Simulation; D005260:Female; D006801:Humans; D008297:Male; D008960:Models, Psychological; D009765:Obesity / Q000517:prevention & control*; D012944:Social Support; D061217:Weight Reduction Programs / Q000379:methods*