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Acronym Finder has 2 verified definitions for HVDRR
Yagi H, Ozono K, Miyake H, Nagashima K, Kuroume T, Pike JW (1993). "A new point mutation in the deoxyribonucleic acid-binding domain of the vitamin D receptor in a kindred with hereditary 1,25-dihydroxyvitamin D-resistant rickets". J. Clin. Endocrinol. Metab. 76 (2): 509–12.