21. The disease has a similar etiology to Hirschsprung's disease in humans. 22. Nevertheless, it appears to be a real clinical entity of unknown etiology . 23. Underlying etiology is the other significant determinant of outcome. 24. The etiology of autism may include excessive glutamatergic mechanisms. 25. There is no recognized etiology for infantilism and little research on the subject. 26. This category of TMA encompasses all forms that do not have obvious etiologies . 27. The family environment and psychodynamics in the etiology of psychosis comes under scrutiny. 28. The diagnosis is controversial, and its etiology is still not fully understood. 29. Neurocutaneous conditions are due organic nervous system disease or are psychiatric in etiology . 30. This is known because in some special cases the etiology can be identified.
