Diablo Clinical Research We are an independent research organization located in Walnut Creek, CA. Our late-phase facility focuses on phase II, III, and IV clinical studies. It was established in 1995 and specializes in outpatient studies focusing on treatments for diabetes and its related complications including dyslipidemia, obesity, hypertension, neuropathy and metabolic syndrome as well as osteoporosis, fibromyalgia, arthritis and men’s and women’s health studies.