FTO and obesity due to melanocortin 4 receptor deficiency: The associations of FTO polymorphisms rs9939609 with the risk of obesity and obesity-related traits were confirmed and the influence of rs9939609 on dietary behaviors (e.g., preference for a meat-based diet and salt and sweet tastes) was evaluated to in an attempt account for any observed physical and metabolic association (Results were reported in another article which was completed by our research team).