1. Primary hyperparathyroidism;Heath;N Engl J Med,1980
2. Primary hyperparathyroidism;Mundy;Lancet,1980
3. Clinical presentation of primary hyperparathyroidism in the United States;Silverberg,2001
4. Asymptomatic primary hyperparathyroidism;Scholz;Mayo Clin Proc,1981
5. Asymptomatic primary hyperparathyroidism;Hodgson;Mayo Clin Proc,1981