C. Bradford Jeffries

Sigma Partners (Sigma Partners) is a venture capital firm founded in 1984 by J. Burgess Jamieson and C. Bradford C. Jeffries. The firm is headquartered in Danville, California.

Asia Renal Care Pte Ltd. provides kidney dialysis and related services in the Asia-Pacific region. It provides hem dialysis treatments to patients who suffer from end-stage renal diseases. The firm owns and operates dialysis facilities in Taiwan, Philippines, Japan, Malaysia and Korea. The company was founded in 1997 and is headquartered in Singapore.

Satellite Healthcare, Inc. is a non-profit, community benefit organization that provides medical services to patients with chronic kidney disease. The company operates dialysis center and provides training and support for patients performing dialysis at home. It also offers pre-dialysis patient wellness education programs that can help prevent or slow the progression of early stage chronic kidney disease. It was founded by Norman S. Coplon in 1973 and is headquartered in San Jose, CA.