Complex sentence: Vitamin D deficiency was found to be related to neurological manifestations and the presence of lymphoma among patients, while vitamin A levels were inversely associated with extra-glandular manifestations of the disease.
Split into simpler sentences: Vitamin D deficiency was found to be related to neurological manifestations and the presence of lymphoma among patients. On the other hand, vitamin A levels were inversely associated with extra-glandular manifestations of the disease.