Which of the following neurotransmitters is thought to modulate pain relief?

A common background among people with somatization disorder is:

A. some traumatic event in childhood B. poor performance in elementary school C. growing up in economically poor families D. growing up in cold and unsupportive families

As part of a drug treatment program, the subject may experience a spiritual awakening. This therapy is known as:

A. the 12-step approach B. relapse prevention C. motivational therapy D. cognitive-behavioral therapy