1. Natural history of untreated primary hyperparathyroidism;Akerstrom,1997
2. Parathyroidectomy: new criteria for evaluating outcome;Irvin;Am Surg,1999
3. Post-parathyroidectomy hypocalcemia: incidence, risk factors, and management;Mittendorf;Am Surg,2004
4. Risk factors for postoperative hypocalcemia after surgery for primary hyperparathyroidism;Westerdahl;Arch Surg,2000
5. Risk factors for severe postoperative hypocalcaemia after operations for primary hyperparathyroidism;Kald;Eur J Surg,2002