Serum aminoglutethimide (AG) and N-acetylaminoglutethimide (NAG) concentrations were measured by high pressure liquid chromatography (HPLC) in 24 postmenopausal women with advanced breast cancer receiving increasing doses of oral AG. Patients received 62.5mg b.d., 125mg b.d., 250mg b.d., and 500mg b.d. of AG alone, and 500mg b.d. of AG combined with hydrocortisone (HC) 20mg b.d. Dose was increa...

The purpose of this paper is to solve the seventh-order functional equation as follows:  --------------------------- Next, we study the stability of this type of functional equation. Clearly, the function ----------  holds in this type functional equation. Also, we prove Hyers-Ulam stability for this type functional equation in the β-Gaussian Banach space.