Wongkongkam, K., Thosingha, O., Utriyaprasit, K., Riegel, B., Ruangsetakit, C. and Viwatwongkasem, C. 2011. Relationship between Diabetic Duration and the Severity of Peripheral Arterial Disease among Thai Patients with Type-2 Diabetes. Nursing Science Journal of Thailand. 29, 3 (Sep. 2011), 124–132.