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).
Subcutaneous B-12 injections may be less painful than intramuscular ones. Your body uses vitamin B-12 to make red blood cells, nerves, DNA and protein. B-12 also helps your body metabolize fat and carbohydrates for energy. Although your body is unable to generate B-12, the vitamin is readily available from dietary sources including dairy, meat and fish. If you develop a vitamin B-12 deficiency, intramuscular or subcutaneous injections may be necessary.