Surgeon Surgeon Jesse Gutnick, MD, explains pheochromocytoma, a rare adrenal tumor, and its treatment Jesse Gutnick, MD, explains pheochromocytoma, a rare adrenal tumor, and its treatment. Nurse. Nurse Joshua Onyan and occupational therapist Jennifer Spieker discuss the role of nurses and therapists in stroke care Joshua Onyan and occupational therapist Jennifer Spieker discuss the role of nurses and therapists in stroke care. Child and adolescent psychologist. Child and adolescent psychologist Barbara Mettelman, PhD, talks about teaching children to deal with stress and anxiety. Barbara Mettelman, PhD, talks about teaching children to deal with stress and anxiety.