<qa>  What is the name of the new guidelines for the management of asymptomatic PHPT?It is now evident that the majority of patients with even mild Primary Hyperparathyroidism are vitamin D deficient. In 2009, new international guidelines for the management of asymptomatic PHPT direct physicians to measure 25-hydroxyvitamin D D3 or 25-OHD in all patients, and to replete the reserve of vitamin D when the level is low 20 ngml. However, no recommendations for vitamin D repletion are given, because of limited data regarding the effects of vitamin D repletion, appropriate dosing and safety. Therefore, there is an urgent need for data upon which to base such recommendations, as well as are data on the effects of such treatment upon bones. 