Clinical Research Directory

Inclusion Criteria: 1. Patient is over 18 years old 2. Patient scheduled for a non-emergency operation 3. Patient eligible for total thyroidectomy Exclusion Criteria: 1. Patient is participating in another clinical trial which may affect this study's outcomes 2. Prior operation in the neck 3. Primary or secondary hyperparathyroidism 4. Vitamin D deficiency 5. Use of drugs that influences calcium metabolism (Vitamin D analogues, oral calcium supplements, bisphosphonates, teriparatide, thiazide diuretics, aromatase inhibitors)