Bradbeer, J., Dunham, J., Fischer, JA., Dedeuxchaisnes, CN., & Loveridge, N. (1987). Pseudohypoparathyroidism Type-i - Disparity Between Biopth Levels Measured By the Renal and Metatarsal Cytochemical Bioassays. Bone, 8(1), 48. https://doi.org/10.1016/8756-3282(87)90140-2 (Original work published 1987)