I have an AB from Columbia (1967) and did post-graduate work in Investigative Medicine at Wolfson College, University of Cambridge (1970-71). Trained in Pediatrics at Stanford (1971-4) and did postdoctoral fellowships at Johns Hopkins (1976-8) and UCLA (1978-80). I have served on several panels and working groups at NIH, been a special consultant to USFDA, and a member of the Executive Committee of Revision of the US Pharmacopeia (1995-2000). I am currently section Editor in Chief of Endocrines: Parathyroid Disorders, Mineral Metabolism and Bone Function and serve on several Editorial Boards. From 2018-present I am Senior Scientist and Adjunct Professor of Orthopaedic Surgery and Rehabilitation at the University of Texas Medical Branch at Galveston.