Jindawong, N., K. Vongvaivanich, C. Chansakul, P. Lertakyamanee, T. Yongprawat, L. Jarrat, and A. Pokum. “A 14 Weeks Prospective Pilot Study of the Headache Registry Program at Bangkok Hospital Medical Center”. The Bangkok Medical Journal, vol. 7, no. 1, Feb. 2014, p. 20, doi:10.31524/bkkmedj.2014.02.005.