<prompt> All of the following are features of anorexia nervosa exceptRestriction of energy intake relative to requirementIntense fear of gaining weightSymptoms emerge in later adolescenceIndividual has engaged in recurrent episodes of binging or purging behaviour  <response>: The onset of anorexia nervosa is usually in the early to middle adolescence. It is more prevalent in girls. They have disturbance in the way in which the body weight or shape is experienced. They also cannot recognise the seriousness of the current low body weight. It can be of two types : Restricting type - Weight loss occurs through dieting fasting or excessive exercise. Binge eating purging type - In this subtype the person engages in recurrent episodes of binge eating or purging behaviour. Bulimia nervosa usually emerges in later adolescence Reference: GHAI Essential pediatrics, 8th edition 