HTR2C and obesity due to melanocortin 4 receptor deficiency: Similarly, variants of the serotonin 2C receptor (5‐HTR2C) are implicated in obesity (Kring et al., 2009; McCarthy et al., 2005; Pooley et al., 2004), weight gain (Opgen‐Rhein et al., 2010), and higher BMI (C. Chen et al., 2013).