PTH and hypoparathyroidism: Promberger Promberger R R Ott Ott J J Kober Kober F F Karik Karik M M Freissmuth Freissmuth M M Hermann Hermann M M Normal parathyroid hormone levels do not exclude permanent hypoparathyroidism after thyroidectomy Normal parathyroid hormone levels do not exclude permanent hypoparathyroidism after thyroidectomy Thyroid Thyroid 2011 2011 21 21 2 2 145 145 150 150 21190447 21190447