Fellow department endocrinology and metabolism Jewish Hospital and Washington University School Medicine, St. Louis, 1982. Member staff department nephrology and mineral metabolism, associate investigator National Institute Nutrition Salvador Zubiran, Mexico City, 1978-1990. Director Mineral Metabolism Research Laboratory, division neonatology Children's Hospital-U. Cincinnati Medical Center, 1990-1996.
Laboratory manager Pediatrics Bone Research Center Children's Hospital Medical Center, since 1996. Lecturer in field.
Member of Spanish Society Clinical Chemistry and Molecular Pathology, Iberoamerican Society for Research on Bone Metabolism, National Academy Pharmaceutical Sciences (Mexico), Mexican Association Clinical Biochemistry, American Association for Bone and Mineral Research, American Association for Clinical Chemistry (member international relations committee 1992-1994, chair OVS membership committee 1994, member international advisory panel 1994-1996, chair exchange program in clinical chemistry OVS since 1994, chair Ohio Valley section awards committee since 1997, treasurer pediatrics materno-fetal division since 2002, International Fellowship award 1996, Bernard Katchman annual award 2001), Mexico Association Clinical Biochemistry (chair continuing education committee, chairman science proceedings 8th international congress on laboratory automation, member science program), International Federation Clinical Chemistry (alternate representative to Mexican Association Clinical Biochemistry 1992-1996, newsletter correspondent and reviewer journal since 1992, member science program XVII International Congress in Clinical Chemistry since 1996, associate member committee in metabolic bone disease and bone markers science divsn since 1996, member at large 1997-1999, member EB 2000-2002, co-chairman science committee XIX ICCC 2005).