Psychopathology and familial stress - comparison of boys with Fragile X syndrome and Spinal Muscular Atrophy. - Von Gontard, A.; Backes, M.; Laufersweiler‐Plass, C.; Wendland, C.; Lehmkuhl, G.; Zerres, K.; Rudnik‐Schöneborn, S. (Journal of Child Psychology & Psychiatry, 2002)