The proposed models of care include relationships with other specialties that do not specifically target this age group, i.e., infectious disease, endocrinology, pulmonary medicine, nephrology, gastroenterology, thoracic and abdominal surgery, urology, otolaryngology, and neurosurgery. New patterns of communication are advocated and endorsed as essential for productive interaction involving these specialties. References are extensive and are oriented toward users in pediatric hematology-oncology medical oncology, radiation oncology, surgical oncology, gynecologic oncology, oncology nursing, psycho-oncology, social work, epidemiology, public health and health services research. The contributing authors are from the United States, the United Kingdom, Canada, Italy, France, Israel, Switzerland and Australia, Germany, Japan and the Netherlands.