Chawanpaiboon, S. , Wanitpongpan, P. , Titapant, V., Kanokpongsakdi, S. , Wantanasiri, C. , Pimol, K. and Sirisomboon, R. 2008. Nifedipine for Inhibiting Threatened Preterm Labour in Siriraj Hospital. Siriraj Medical Journal. 60, 3 (May 2008), 111–113.