1)Kramer BS, Brown ML, Prorok PC, et al:Prostate Cancer Screening:What We Know and What We Need To Know. Annals of Internal Medicine 119:914-923, 1993
2)Fletcher RH, Fletcher SW, Fletcher GS:Clinical epidemiology:the essentials. 5th ed. Philadelphia:Wolters Kluwer/Lippincott Williams & Wilkins Health, p 253, 2014
3)Fushiki Y, Kinoshita K, Tokuda Y:Polypharmacy and Adverse Drug Events Leading to Acute Care Hospitalization in Japanese Elderly. General Medicine 15:110-116, 2014
4)Tokuda Y, Koketsu H:High mortality in hospitalized elderly patients with feeding tube placement. Internal medicine 41:613-616, 2002