Devang K. Parikh

Increased Systemic Catecholamines in Complex Regional Pain Syndrome and Relationship to Psychological Factors: A Pilot Study

R. Harden, S. Bruehl, N. Rudin, 2004, Anesthesia and analgesia.

Psychogenic cough treated with biofeedback and psychotherapy. A review and case report.

B. Riegel, J. Warmoth, S. Middaugh, 1995, American journal of physical medicine & rehabilitation.