Chimerism is a very rare condition caused by the fusion of zygotes (fertilized eggs) into a single form during early cell duplication. It is extremely rare, with only forty or so known human cases. It is somewhat more common in the animal kingdom.
Cognitive-behavioral therapy is an action-oriented form of psychosocial therapy that assumes that maladaptive, or faulty, thinking patterns cause maladaptive behavior and negative emotions.
Cognitive behaviour therapy (CBT) is a type of psychotherapy that helps the person to change unhelpful or unhealthy habits of thinking, feeling and behaving. CBT involves the use of practical self-help strategies, which are designed to affect positive and immediate changes in the personâs quality of life.