A. Sukwatjanee, K. Pongthavornkamol, G. Low, N. Suwonnaroop, W. Pinyopasakul, and S. Chokkhanchitchai, “Benefits of a Self-Help Group for Rural Thai Elders with Type-2 Diabetes”, PRIJNR, vol. 15, no. 3, pp. 220–233, Feb. 2013.