PTH and vitamin B12 deficiency: In particular, anemia was present in 45.7% and 46.8% of patients, iron deficiency in 61.1% and 64.9%, folic acid and/or vitamin B12 deficiency in 34.5% and 31.9% of patients, parathyroid hormone (PTH) increase in 20.1% and 28% of patients, hypocholesterolemia in 12.1% and 8.6% of patients and hypoproteinemia in 3.4% and 4% of patients in Group 1 and Group 2, respectively.