Type 4 Waardenburg syndrome (also called Waardenburg-Shah syndrome) is characterized by symptoms of Hirschsprung's disease in addition to the classic features of hearing loss and pigmentation abnormalities.
[Effects of a vitamin B complex on functional recovery after nerve injury (author's transl)]. Hasegawa K, Mikuni N, Sakai Y. Functional recovery after nerve crushing was investigated in the following manner: Under pentobarbital anesthesia the sciatic nerve of the rat was crushed at the level of the hip (proximal crush) or the thigh (distal crush).
All of the following statements regarding vitamin B6 are true, except: a. arge doses of vitamin B6 may cause irreversible nerve degeneration. b. There are three forms of vitamin B6: pyridoxal, pyridoxine, and pyridoxamine. c. Fiber does not appear to interfere with vitamin B6 absorption.